GeoSci.xyz GWB Lectures, 21 Feb 2020

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From YouTube: 2020 02 21 Day10 Part4 Survey Design

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What these that's, what these levels refer to.

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We usually only highlight six or eight in each level. 11.

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Kumar highlight oh man, she invested team together city.

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Because, once you start getting too far birth, they can get noisier. Yeah.

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We're doing row row domain and we almost used always 500 milliseconds from doing.

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And then usually use 5%.

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Stack mins to Stockman's for max for max.

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And mastic some.

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People prefer to leave these at 3 and 6.

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Leave q max at 3%.

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When you're in electrically noisy areas and.

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At the gate again.

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Takes much longer to collect data.

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So this is a good.

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Save energy study just amount of voltage or of current.

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Get a potential voltage.

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We and iris recommend using the 50 millivolts in.

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What that means is that we can put in a maximum 600 volt.

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And he will get 600 volts going into trying to at least get 50 millivolts of potential voltage.

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You look at the data that we have been taking over the last four field. Trips you'll see. There are lots of very small millivolts under 5 millivolts of potential voltage.

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We want to give the best chance to get good data.

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See the higher the potential voltage measurement, the more reliable it is.

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And then I change that to 600 millivolts. It doesn't matter.

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Are the larger Cisco Systems.

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Remember you can expect to turn a cell on.

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You can just highlight them.

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Let's just see what that turns into when we standard computer.

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This means it would take 21 minutes to collect not 12 hours.

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Even be not sending it, she was a Pentecostal 'unity, Nico better. Oh, you got the body.

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I, don't really watch that the same just trying to go the standard compute.

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Okay, we'll say.

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So then, let's look what the graph shows.

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The read 30 point: the report point goes down to a 30 meters only.

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Fun toy and you.

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Can see that it stretches it to the 600 200 400 620 meters.

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Go back and see what would happen if we turn more of that.

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So you can see that it's looking down deeper.

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When we get farther and further along, you see, it goes over to injecting between one and sixty two.

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Injection I think that it doesn't that's it, but.

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The MN is always only one spacing apart. Ten meters.

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You know these are just one number difference. That's the M! That's the end.

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If we go through to the very end, it's still only ten meters, apart for the M and then.

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We die like whadda and equality.

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And so the problem is that the potential voltage might not be very large between two near electrodes, but if we increase the separation between the M&N electrode, we have a better chance of measuring a higher potential voltage.

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So we've got our we've got our a and B electrodes, but we're always just 1 meter of 10 meters apart one spacing apart earner and and if we expanded, RM and FN, which a child.

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Likes yeah, so if we expand it to be 20 meters, that's that we got it at a time eh. We.

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Might get twice the potential.

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To pension and socket dog so.

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We go from 2 millivolts.

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So that's the reason why we don't just turn it on all the way across, because we want the electorate's to be farther apart to measure a higher potential voltage.

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To turn those off all I'm going to do is hit the delete button.

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Yeah I just had to highlight them again, so I just hit the delete button to turn all those off the.

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Beam hit anything so.

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For a dipole-dipole, you juicy just used six, that's what that was to meet.

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Up with oh good time, though, for.

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A winner Schlumberger, you can use eight put Vanessa.

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Image arrays are not sitting on it. What.

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We want to try to expend our electrodes and our forming our AV electrodes, N or M, and so we generally just do six.

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One right here.

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On another six: let's see what that gives us.

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So we'd have a little overlap here. I'm.

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We compare these if we were concerned about the separation of our electrodes.

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Getting deeper we're down to about 44 meters.

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And we go back again and we turn on the next level.

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Do a standard compute for up to an hour of data collection now that we're slowly filling in the deeper layers.

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So, let's just turn your s to them on.

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This is the winners.

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Number G that we've been running all along fifteen hundred and thirty and okay I fill in these last positions because they don't take long to collect and just help.

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Strether now.

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Can see that it flashes and tells you it's estimated maximum investigation depth from that one.

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And there's what it ends up, looking like.

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Just see what happens if we filled in some more down here.

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So let's see the Blues in there the late blue color, late, blue color.

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Here, what we do is just go back and turn off these ones here.

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So see now these ones have been filled in right here they filled in it where the other ones were. So you can see that you can get some of the same measurements or similar measurements by using different levels. That mode with two out.

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And the reason.

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You, if you're going out doing surveys and you're finding that your potential voltages are very small.

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You might want to make sure that you get larger separations up to.

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90 means you're electro, so your injection electrodes are 90 meters apart. What.

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Was that be yah yah, so.

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Let's just see what to make this.

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See what 9a is giving you there.

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We go back here and we check that maximum depth is one twenty-eight point five, but this will give you higher potential voltages.

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With this me, I'll beat it so.

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We haven't surveyed all over Myanmar. You might find that you're getting very small potential voltages with the sequence file that we set up earlier.

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It down by you.

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Might want to get into the 80 or nine eighty level.

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One way you can do that is just to highlight.

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Five, each time to an overlap, just do five today.

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I love it yeah.

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So I stood there.

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And so we're still getting significant depth.

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32.4- and you could just turn on these last few to make sure we get the strong potential voltages.

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So the reason for the including 9a and more of 8a is to improve your signal. Strength.

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In fact, if when I was going to do four, so I could get 90s present. In the same time,.

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Another one I would consider doing.

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So why are you changing all of the docks and the 4706 dots or when it's them right, yeah.

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I'm just showing that if they get a.

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Little note down there's without yeah, that's about it.

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If they get weak signals, we.

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Think an arrow on a today potential.

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Voltage, that's.

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What it's an endlessly in it then.

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They're better to get a spacing larger. Why.

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Does it reveal its phasing with Neville Chamberlain I know, but.

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If you expand the spacing, you get less resolution, the.

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Man spacing moved in any man, take a resolution job so.

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You can get your best resolution and depth if you just highlighted this whole first row.

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Would have very close spacing on your MN electrodes.

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But your signal strengths might be too small. The strain got a theme, a.

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Looks like I could have turned down more than just a second.

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So there you get right down at the bottom, so this would be a sequence that you might use if you find your potential voltages aren't very high as you move around Myanmar.

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No remaining I never did not module in the air, but one tiny Katara. The potential takes on a Leslie now sequence. It.

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Tell me time we added if you're, seeing numbers under one movie, for instance,.

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One maybe go out.

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Although we didn't do it typically, what we would do in the field after we collected a dataset.

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Downloaded and immediately take a look at it in process I'm.

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Acting like one of your guitar, which had a fatality, many Vilma, guitar, yeah or quality, will decide see. We are ready, be honorable to our game, because.

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We have all the electrodes spreader Cinetopia.

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Has spread up, he looked happy does running it.

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Will take us ten minutes to take a look at the data to see.

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If we have the good signal.

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Sorry next one's gonna be there that we're not without team a and.

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If we don't have good signal strength, we could put in another sequence and it would only take an hour and a half for it to run another.

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Sequence and chop it off and I clean up to be like signal, I'm accounting. Where did that? What's its young today and.

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We might get better signal strength plus we could combine the two data sets data.

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Set when I found it I know it doesn't. We are a you know, signal strength, go gamma, I'm, gonna gather in a coalition be honest.

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These are all tricks of the trade.

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He said these all come from experience.

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I thought no, no.

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You know in every Giovanny urshela.

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You come back from the field and you have all bad data.

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In that block, Ethernet be anything I, don't need I'm, a koala team, ecology data booyah here mister then.

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You scratch your head and say what should I have done differently.

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So one thing is to do what I've suggested here to make up a sequence like this, which you can do in the field.

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You could even do it before you go and just call it something different like a.

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And then one other trick if, if you're pressed for time when you're in the field team.

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Baby Yahoo, a house that was in a combat 70 now so yeah.

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Let's see so, this was going to take an hour and 17 minutes right.

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You can shorten the time up to 250 milliseconds.

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I'm up saying things use an onion how's that many seconds that's a shell feed off so.

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That's the order of a second for each injection.

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So if we standard compute that we drop off to 48 minutes, so it's just going to take 48 minutes or 39 minutes out. Oh man to.

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Collect that data set. Thank you that, second time we need it back so.

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If it's getting dark or you have to.

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Get home for dinner.

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Can consider that, but there's a chance that your data quality will not be as good.

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But I think one of the other data quality of.

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Yeah, you can do one of two things to also shortened time and that is reduce the stocks stacked. It.

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Was show I adapted a table.

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Somebody something like one in three and you increase the q-rex.

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And let's see what the time comes up now come on that only saved us five minutes.

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Reducing the stocks like that.

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Achievement we are oh yeah, no misery, we mean I. Am this exaggerated diversity, so in that cup, a chain ah yo yo.

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Can use like one three also like for the static numbers now.

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We shorten the time.

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Minima so no mistake from young age, any nominee, love McQuarrie's or a stick dominate the available. So.

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Here I reduce the stacks, just one staff, the.

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Ones neck like an enema and.

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That would be 37 minutes instead of 48 minutes. You would say.

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You danger quality is going to go down, quality.

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Did that quality? Oh no watch out.

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Call it jump one of the thousand there's a night time, but in every man we got it. I may take neck. Oh my.

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Now or never gender up the algebra IRS that cancel.

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Your I know I can.

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Every our name operative.

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um Yeah I, don't bother, people got a good job. It's all.

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So that's that's just a trick. If you're late in the field you're trying to get an extra dataset, that's our.

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Eau de Caro: that's that the cool ever got me Bobby take the ball, but we haven't.

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No naka banks in this over there Kotaro single shorts I live in LA in general yeah at Normandy, the second book there, man.

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A good data collection is the one that you have seen already and that you've developed in that system for the winter coverage.

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Turning on six.

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Then, once again, for that trick, once you, if you're only doing one line with the setec that you have.

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You can see where it finishes. The first cable at 18 miles.

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Don't give it people that system of event and.

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This one's finishing at 600, 97th, quadrupole.

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Which you can read on the iris iris, my family, everyone that will know about it. It tells.

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You each time that collects how many it's collected, which one is for in developing.

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That what collectively these, what you leave israel, I yeah- I yes spring up yeah, so.

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When it gets to that one, you can disconnect cable number one.

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Then start to take all the electrodes as well as the wires, and then you can look to see where it stops. Number 36.

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So it's at eleven hundred and eighty out there Yost is there. You can collect that. Second.

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From there you just have to wait until it finishes, because you can't just connect the cable.

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Me etiquette Osama. What that is so.

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After this point, there's no electrodes that are numbered 1 to 36 and llaman.

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About digging it, oh that's how she she take that trophy out of the dogs. You know, and after.

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679 was 697, there's no one 218 electrodes after this point.

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The gun is this: shitty later on this year, Oh.

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Any questions anybody has done on these Genevieve.

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Ever made SME vibe and.

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If you want to do dipole-dipole, you use a very similar in the over.

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And because the dipole-dipole has lower levels, I tend to turn on the rest of these.

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A good chance- this may be bad data down here, but you can. You can take that out or using the automatic filtering.

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Only as my Yamaha.

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So well here this changes back to 500.

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And it doesn't suit me.

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Not sure why that's all you never! Oh, oh! Oh it doesn't matter. Oh yeah, okay, thanks yeah with the dipole-dipole. You have to make sure that you just put two channels in there.

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Default on Electra pro is ten channel because that's their bigger units. Let's.

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Approve money we had a, he never beat high alguna valid channel marks a movie about the doís, the state Senate.

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Magnetism Roger Osaka to.

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Set another power to Chandler, but it'll do.

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I always think there's software.

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It just keeps on going back to one.

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I'm not sure why this is dubbing on everybody else's.

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Can somebody do one six, somebody change this number to one.

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I want you to just do it to see what happens.

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What stick minimum one stack: maximum six yeah.

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It doesn't matter I just wanted to try judging the stat minimum two one.

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I'm just going to see if I can make it three thing.

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Take there might be a glitch in the software or something anyway.

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Okay, so we do a standard compute on that send it off. You come back. Take a look at the graph, stop with you man, so that's dipole-dipole and.

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That would that would hang out now.

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There is something down here: called gap, filler laundry poles. So what the automatic system allows you to do is include a whole additional set of measurements because it can collect two data points at a time.

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See down here, working 2423.

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If we go to allow gaps or quadruples and.

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Laughs captive by the force right now, then.

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We do it standard compute.

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1:24 time go time.

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No, it looks like with this with the two-channel system. There's no advantage to adding.

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There's no advantage to using the gap fillers with the two-channel system.

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Even opening it up again, it's still a dying because I changed it.

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If you want to make a new file, I know they said no, then you should save the one you're working in.

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It a different name, I met.

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Another guilty.

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Never know and then you're working on a separate father great so now I could change this to the winner Schlumberger that we have originally changed the name and.

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Then nothing and.

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You see how it automatically turned off all the extra points, because it knows he can't use those. That's not.

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A generator unable see he's playing how that points did that we do it. What if I thought so when I said I'm done really I was like it's out, I think so.

D

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May remember this when we were out at you go remember we had a problem because he kept on seeing 8 meters 8 meters instead of 10 meters, when we did the north-south line.

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That's because we kept on changing the file on here and it changed it and that's what we uploaded.

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Now I'll be taking my uploaded in the time where I would walk then.

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Anytime, that you want to change a sequence file, take one and save as a new one or just choose new and make a whole new one from the creation stage. You.

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See question I can modify the course I, almost wonder, storage of any time you have me I, tell me how I could have a motto: saigo, no Meah, I kind of would have it yet. That's all okay, none of its autosave each and every time that.

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I was related. You never wanted to be a stampatto.

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Don't try to convert one you already have, because you probably want to keep that one.

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So the last thing, of course, is the configurator is to upload a great decoration.

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Maybe a little bit not so you.

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Go to upload laughter, oh man and then remember you set the iris, go to sequence, highlight.

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Upload sequin Heine a bloke little zest, a pedometer and.

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Once the iris says, ready synchronization, when you just go.

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Back and you look at us or not: okay, okay,.

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It for electric probe natural brunette with evident about a does. Everybody come through with process.

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Devin will do everything right, yeah many.

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We want to go there, so no, it's not complicated the thing about Paul dipole. Is that it? If you do a good ball dipole, then you need to do it in the reverse format to so. This is no.

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Type of your sequence: this is a sequence for compact array, yep.

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Let's just do a new one, like I said: don't change meet you.

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So CLO and a full dipole reverse fold.

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I go for what that portable, reverse! That.

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If you start reading about it, they actually call a and B C 1 and C 2. So this is an a remote dipole. It really should be 10 times the maximum length of your spread. A.

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Wick yeah I made cooler yet say it's not yeah. If.

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It's closer, you have to compensate for it and it's not a simple thing to do, and.

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I, don't know how to do that. They know she had a decade ago. I'm.

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Not sure what saw he did, he did an interpretation for us overnight on the full dipole data from from the Technical Institute.

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The TV antenna array that they durable something portable, a local interpretation, will nominating they well then,.

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He treated it as if it was infinite away, but even at the away machine a and he also treated it with the fact that it was only 700 years.

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At this site there was very little change.

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Nickel money, no.

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Theoretically, you it sort of shifts the data, if you only do it from one direction. So that's the forward direction now for what direction to collide.

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The reverse direction is.

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If you put c1 over here, see what a month down colleague.

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That's a no actually.

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C2 is infinity your weight on this. Do what even in a way my time I'm.

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Missing and that's the reverse direction, every bus direction direction so.

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You and again I, don't know what simple calves for doing the reverse direction will have to check a must.

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Direction mattress in fact, there a possibility, but.

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Let's assume you're only going to do a forward, one.

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Can see that infinity instead of nine nine nine point, nine, nine nine ninety-nine.

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Point: nine: nine, nine, seven yeah. We.

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Can change everything else up to.

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At 500, milliseconds.

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So you just do very similar to what we've already done. We're turning on levels with the with this one I might consider. Turning on two more we'll see what happens, sit down.

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I'm doing eights now I.

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Think that's what I did with the other one.

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D

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Because we can people use six to eight, but this one I think will allow us to go all the way I like to use the full suite.

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So I chose eight because, with the pulled dipole you can get down to the 980 level. 9.

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8 leva to follow you gotta, go down below and.

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That gives you a wider MN to get a better potential voltage.

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And Bella quit see, I, look at the table and.

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Still keeps the resolution.

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So I've still got ten channels make sure you change the channels.

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Turn it down be able to line anybody.

D

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This is similar to the one that we ran yesterday.

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Okay, so then we can. The graph is right. There look at the view sheet to see what it does so now it sets see a 2-0. The Evo's eat, okay, client, let C 1 C 2 here was actually sitting. It is.

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This is, this is irises, preferred designation. They just changed the CA because you have to take your remote electrode and you have to connect it to see a on top of the iris.

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Obviously, if I.

D

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We cheated the system because I just designed a file to allow us to hook the channel 1 I.

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Know why my take what I do I third them, but then I like to.

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Take it what but it's until you understand the system better and processing, using Excel and text.

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File process value analysis in a moment, I.

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Recommend, if you're going to do dipole-dipole you connect to the CA.

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Well, that would amass enough. Ca would join me and then.

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Electra pro or a process will produce a correct file to be used in soon so using the the data file that we took the other day at.

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Gt I was not converted properly by process.

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Because it thought that the electrode that was in position, zero meters, was just one of the one of the electrodes in the whole array. It didn't know that it was.

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So it process picks the file up and it thinks it's a mixed array, not mixed.

D

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Matter how much you push it? You can't convince it that it's a pole, diaper.

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Whatever get girls doing it, you know, but.

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If you do have this hook into CA, never responded.

D

They might say miss or not so.

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If you do decide to do pull dipole mark the position know how far away it is or.

D

Not we did the PMA before.

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This angle, please I'm mocking Amin in x and y direction in a winding direction and make sure that you hook the wire into CA.

D

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Run the survey and it will work with process and you can put it into.

D

Simple- and they know maybe Bruce estimated- that being sent back to technical, so.

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That's bull, dipole,.

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Information because weather like they have to check to connect the CAS SVA. Is it like, maybe like an activity a like that CA.

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Is just on letter C.

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Is one of the electrodes do.

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You wanna go down to get the just get the Cisco.

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You have to have a banana puck and you put it into CA.

D

A

D

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Ca right there yeah, so you have to connect that a look, remote electrode to see a oh.

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Your plugs, you still have your plugs in in the top, so you still have you 236 connector electrodes with them.

D

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You have 72 electrodes, plus you have a remote.

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So your first measurement would be this. Here's.

B

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You still have your 72 electrodes space there and.

D

My 72 natural kind of there- okay, yes,.

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And your first measurement will be an injection here and here so the current gets injected. Then you measure potential voltage and then your next one will be M, 2, n 2, and it will continue all the way across.

C

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Then once it goes to 2 way, the M and n will be two things apart.

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Then the next one will be.

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So the measure that's what will cross up and your injection will continue. The Peter.

D

And judge you're sending a lot of vomiting until you finish.

D

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The Cisco always has to be in the Senate 36.

D

So I see bees ready, Emma.

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You have to have the iris at the center.

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Because we have a short key, we only had the.

B

A

C

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If we have brought this wire.

C

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C

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Would have only been 350 meters away from the nearest.

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Electrode, an easel network name while we go, have nah sale of it to up she know so.

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We wanted to be further away, which is why we went out to 700 meters and after we collected the data with.

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Roll okay, we connected a long wire to electrode 1.

D

So now juicy will wine at the joining that's a.

D

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We noted the poor dipole.

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Because we so that we can join from the first extent.

D

A

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Gti we connected to 700 meter long remote electrode to take out number 1 on the cable he's like we.

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Had a, we had a whole bunch of smaller cables.

B

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We disconnected.

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C

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This is, this is a sheet of the injections.

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Normally, this would say that it was at the zero.

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Leader position.

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And so now she mention what we measure in GTI 172 in the 72 click with the clickers, and it means that, like joining the table out to 73, naturally, which is far away.

C

D

Way they did measurement a GTR, that's so what? What is the bottom? One.

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Was on the self.

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We only need 71.

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Electrodes connected to the cables to the red cables, red.

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Cable then joined nothing when that's the town watching Bay and the first.

A

D

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Now look here is a normal. This is a winter Schlumberger or a dipole-dipole right. In this first column, the first electrode is number one. Two three four.

D

With s lemons arepas are no bus nettles another one. One would be kind of what.

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To do but the pole dipole sets the first electrode does zero about.

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The metro cuisine eliminating machine the.

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Machine and machine knows that zero is ca. Ca.

D

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And one is normally still one.

C

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First of the first.

C

D

A

D

A

D

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Here's here's! What I did here's? What I did to talk I'll just explain this quickly: I.

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Saved this dipole-dipole.

C

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A text file that one that vortex fighting the fire.

C

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Here's the file that was put in these are the positions of the of the electrodes one to 72.

D

A

D

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So that's it's going to inject. If I don't do anything different, this file is going to cause the sis Cal to inject the current in CA and then in electrode one and then the potential voltage will be measured.

D

There but I trip: this is Cal David by Jimmy.

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Anything this data file I made these are 1 and I added one to all of these.

A

So if we had had a long wire, the first injection would have been into CA and electrode 1 and we do electrode 1 until it came to electrum to okay.

A

But by changing this text, file.

D

A

Then importing it back into a lector Pro.

D

A

Made a call them all ones: sick,.

D

One at a time and.

A

I shifted all of the other electrodes by one, so this became two green.

D

A

In my phone for my.

D

A

Became 2023, so it was, it was collecting the data as we wanted it, but it was using the first take out on the cable instead of using CA.

D

Phones, you know they must see. Okay, I.

D

A

Expect you guys to be doing this because this is an old geophysicist trick.

A

This is an old geophysicist trick.

D

To physics, my thumb me there all right if.

A

We don't have enough wire. Why.

D

I'm, not machine clean, then.

A

We just make the Machine collect what we wanted to collect.

D

Sounds easy today, though, and then we'll maybe later the ball change.

A

The data afterwards, we don't want, they know down below MA, okay, so that it thinks it has a remote electrode.

D

A

I, don't recommend you do this when you get a long wire and stretch it out, take the position and run it all the way back to ca on the Sisqo.

D

A

Sorry to leave you in a confused State.

D

A

That's just you'll learn, there's more and more to learn about the Sisko unit. You can do a lot more with it for now, just do the winter Schlumberger surveys and you can call me or you can talk to us if you want to extend it further than that.

D

You don't know Bobby Tolan on kwame's. Actually there may be contact with me, miss on it and.

A

The reason why we did that is that.

D

With shockwave unity, loves, it I mean Cisco. The.

A

Reason why we did. That was because we wanted to see deep.

A

D

A

Other questions.

D

A

D

C

D

A

And then the best you can expect to see with any of them is one quarter to one tenth of the length of your life 25.

B

A

D

D

A

An easy number: if you have a hundred meter array, then you can see 10 meters to 25 meters to.

D

D

A

With any ring, even though he was alive, but you will see closer to the 1/4 side with a dipole-dipole.

D

A

Your signal strikes might be we can you believe it all right. Poor quality data.

D

A

Most reliable, a winner Schlumberger: oh these.

D

Are the Dom you know and when and that we are they? Don't human nevermind, a quality common resolution Dominus a way which.

A

Will see between one-fifth and 1/7 of the length of your.

D

A

If you have 700 meters, it will see 100 meters to 140 meters.

D

C

D

A

More resists of the surface or the apparent the more resistive the upper layers are, the deeper you'll see, but your signal strengths will be weaker.

D

Miserable me, dammit I'm gonna be mentally yeah. It's taking us friend, girls and.

A

You remember the plot said: Doug showed if it's very conductive, if it's low resistivity all the current focus is shallow.

D

I'm, an assistant if you drop on resist, even as no the Koran yeah Bobby, no Bobby,.

D

A

Your depth of penetration is dependent upon the Reese's Tiffany's in the ground is.

D

D

A

Just the length of your life.

D

A

If you're in a very conductive, if you read a very conductive environment, you want to try to stretch your electrodes.

D

A

We have done in those environments. Is we get a lot of wire and we stretch it out further and hook it to the cable which is in closer?

A

So if I wanted to get a thousand meters.

A

D

We have seven hundred and.

A

A

We have seven hundred and ten meters of length. Let's say that I wanted to get out to another 150 thousand years, so I wanted to be 300 meters here from pardon me, 150 years here.

A

Here's my take notes on my cable.

A

So let's say this is 1 2 3, 4 5.

A

What I might decide to do is get a long wire vache. You may scratch it or to an electrode out here. That's.

D

A

To polemic or use channel number 1 for that I'll leave travel to where it is and.

D

Then also vegetarians.

A

Channel 3, maybe to be 50 meters away from here so now, I lobbied on 50 meters, then I'll stretch another wire here. So now I've got three electrodes.

D

In here there's a abhidhamma Bob, you know: let's go down to program, another.

A

D

Remote electrodes that out now wait a I'm gonna go.

A

But you know maybe it's easier just to stretch one two and three and do.

D

The same thing at this end, I've been my leg, dammit hello. We got it and then I'll just.

A

Use electrodes for 268.

D

Came on be honest,.

A

D

The 18, but though my life yeah and.

A

Then I'll use electric probe to inject currents. The way I wanted to take my name and we'll get data for every 150 meters.

D

A

D

Real value but.

A

Then, once you get your data set, you have to go through it and get the positions correctly. Was this an amount of you know remember how in process we could choose to shift the records around, so you can shift the electrodes with that or you doing put again. This is for the next phase of gwv.

D

A

This we just confuse you too much.

D

A

You know the term category 5, cable, Catholic, 25 cables, what about it? Cat, 5 cables? What supplies computer systems are.

D

Get five cables or about a system, the bottom opening this.

A

Eight flyer, 22-page gate, that's the thickness of the water very thin wire yeah bob is 22 gauge is the size of the warrior. That's in the cables, the red cable, a my body, grateful a.

D

A

To those of the top of this cable is cheap, inexpensive and.

C

That's what we.

A

Use to extend or is cheap, that's expensive.

D

A

It's available all around the world, so that's one way that you can extend your table. I mean.

D

It at the wider without me know I hate them. You know in.

A

Canada 300 meters of this cost about $100 I found it. So it's at ten thousand chat, 300 meters.

A

It's hard to do it's hard to tell hundred thousand Jeff, but they know it's probably less.

D

Expensive you that know me know.

D

A

That's compared to the cables downstairs, which cost 250 million five hundred thousand.

A

Those cables are 2,500,000.

C

C

A

No, each cable, its 2,500,000 chat.

D

That's where you move 25.

A

Lakhs right, it's $2,500 Canadian and it's a one.

D

How much you know that nothing I should that's why you have to take care of.

A

D

D

The OB or max should.

A

Be ten beer for time.

A

Okay done wind up.

D

Advanced training, I.

B

Want to make a comment about depth of investigation, so comments your.

D

Mommy auntie winery that vacation.

B

So what max is provided is a good general rule of thumb.

B

Remember this is what this is, what we had. We have roll one.

B

Layer four five: this was this- was our eye idea of what the earth could could be like.

D

B

Remember this was our upper aquifer. This might be a clay layer.

D

B

Might be granite and this might be our fractured aquifer.

B

Okay, so you are designing a survey and you want to see if you can see deep enough to see this shallow or this deep aquifer. I also want.

D

To see the deep, a preferable in the house of rotor I really looked at that design.

D

B

Can get insight by just working in the lab before you go into the field.

D

Lab ten miles, Oh sees me on it. You know my fee was there.

B

So say you you're looking for for this and you you're going to do you think let's do a winter Schlumberger.

D

Goody when I stammers, your nano banks, was, in my day, yeah.

B

So you set up your electrodes on the surface and then you want to see. Okay can I see deep enough to see this deep.

D

Aqua and that baby 19 I was in that day in.

B

Order to do that, as Max said, you need to have a length- okay, that's sufficiently long, so that you can detect this mower target.

D

And the local judge other than over my she did savvy language. You know. Yes, she came out.

D

B

He also mentioned if some of these regions up here are conductive, then the current just goes through here, and we don't see this okay.

D

That, for a little while back without suggesting pick Yan Yan do this 100.

D

B

The proper way to attack this to see if you have a chance of finding this is actually to set out a proposed array and then do a numerical simulation of the data.

D

D

B

You collect you, simulate the data and then you've got. You know, sort of an apparent resistivity right. So you see see something in here and you do this twice. You do it without this aquifer here and you do it with a bomb.

D

A bomb, and then oh man, yeah.

B

So, first of all, if you can't see the difference, any differences in the data when this is not here compared to when it's here then you're not seeing this before.

D

She bought it how.

D

Do you like jacket.

D

B

That is the first big thing that you can do just to check to see if your field survey is about right, so don't.

D

Be something up my design, D.

D

B

Means you need to have estimates, for you know what this fit. What this thickness is he.

B

Right and for the resistivities this, this David loves team is recommending. You have to have some good estimate for what these are. My.

D

Movies, you know debate but not, as he may not end up today and.

B

Then, as I said, the the first thing that you do is to see first run without this. This aquifer energy.

D

B

D

B

And then you look at the differences with of the of the numbers, so for some some value of the resistivity in here the difference. If that difference is large compared to your noise, then you have a chance of seeing this.

B

So is that is that concept understandable.

D

B

Though you can calculate this, we have some apps, we haven't discussed them, but we can do a forward simulation for the 2d. Do.

D

These simulation.

D

So we can put in about two: you have to do a hobby.

B

In all of the apps that we've been providing for the 2d inversion, of course we have to be able to. We have to be able to forward model the data.

B

And we have an app the tent that allows you to put in various 2d structures and then to do a forward simulation.

B

So here's our earth right and now we're we're going to put in you know maybe some blocks here like that.

B

Okay and then we can design the experiment.

D

B

Suppose at this particular location here we're going to collect. We want to see if we can see these these well, let's see if we can see this block here so we'll do an experiment. So here's a B, here's a m-- and.

D

D

B

The first thing that we're going to do is to calculate the voltage.

D

B

And okay, without this block a block, my father did this. So, let's suppose that's one point. Three volts!

B

It's pretty big! Okay, but now with I put this block in and now BM n is equal to one point: 6 volts.

D

B

That means that there's a difference I'm sensitive to the lobby.

D

B

So that's the first thing: we have to be able to see that there's a difference when we put something in.

B

Now the second thing is that each datum has some noise associated with it.

B

So suppose that noise is like plus or minus 0.1.

D

That's Elena's, no quick one. So.

B

That says that this first measurement would be between 1.2 and 1.4. Thanks.

D

Why doing at what whiteboards yeah so.

B

It's it's uncertain, but it should lie in between this one, and if this one was let's say your point plus or minus also 0.1, okay,.

D

B

This lies between 1.5 and 1.7.

B

D

Those are different: okay,.

B

However, if this noise is large, if this noise was point three- and this was 0.3, then the two numbers would overlap and then you're not so certain that you can.

D

B

So this is this is where the importance of understanding the noise of the data comes in, as well as what kinds of structures you're looking to.

D

A structure you know really around a.

B

So that's if that's the first thing, there's another way to of trying to quantify this, and that is to do a modeling of this and then do the inversion.

B

Okay, so what we'll do is we'll you, you want to see if a particular array can see these two blocks.

D

B

You design your survey and then you add a little bit of noise and then you go and you invert the data and.

D

B

D

B

The data you know, if you know, then you see you know, there's a resistivity. You know something here and something here and then you know that your survey is perhaps okay.

B

And then, when you, when you're doing this okay, when you're doing the inversion, then you can also do that extra step of depth of Investigation that I. That I showed.

D

These not Houdini I do like their when they ovulate at D, 1 and D whiner. Everyone take a change. They re yeah.

B

And then that on the inversion will show up, as you know, some region here, that you can't see wha, lining the leg down below and then really you're just sensitive to.

D

B

The whole concept- excuse me how deep am I seeing should I use a Schlumberger winner or use a dipole-dipole? It's it's complicated.

D

B

The first idea is that, okay, maybe you know a fifth of my total electrode separation, I'm staying down that far.

B

So that's that's the first thing. The second thing is like oh, but it's going to depend upon what the resistivity structure is of.

D

B

How do I account for that? Well, maybe I should try to look at a forward modelling and see how much difference it makes. If I put a body at death.

D

Look more than okay.

B

You could do this even with a very you know, very simple model. So, let's suppose I have a a uniform half space and.

D

Now I have space and.

B

Now I put my array on top trouble, a winner whatever and then I attempt to see if I can find this. This block.

D

B

We can do that in two ways: one just modeling with the half space and then modeling and with the block.

D

Okay and then see if we see the.

B

Other thing is, you can see if you, if you invert these data, do you get something out that that looks looks.

D

Like this, another inversion looks like many, but you don't you. Let me on a TV hello Pope than you do in Idaho. I love resist, even if I would say machine and.

B

Then the next computation might be. Oh, maybe I got a conductive layer here. So I've got a conductive layer. Maybe I think that's 10 meters thick so.

D

Inductively at who she read it daily as kouhaku, she may lobby the same another and.

B

Maybe it's only 2000 meters.

D

B

That case, just the same survey still can I still find this block. I.

D

Know I want a bit of 90 man. Looks you like they don't let you have your 8 block. I am and.

B

The best way to test that is to stimulate a survey and then attempt to invert the data and then see, if you can still say.

D

D

B

Can't then you're going to do what Mac said and then somehow extend that electrode array so that you got currents way out here and that you could drive current down into that body under.

D

The words our max do not you're on a diet, Vanessa net electrode with the angle no time yeah tabular my people. They join me Toma, I, okay, now let people be yes.

B

So those are those are comments that I think are just generally important and if you keep them in the back of your mind, then it just helps you generate a better survey and to set the proper expectations for what you might be able to get out of a survey. It's.

D

Not the endings I mean I'm dressed up in it by Al Andalus. If we donate a quickie he's alone, I, don't stop, it will cease any comment. I'm Yuri! Yes taking my top. You know, but hey grossie, not that she did talk about comment. Bono, that's a beta, not retiring.

B

But that's sort of what I want.

B

Your head still spinning.

B

Okay, is there any any questions.

B

So maybe just to wrap up, we will be posting all of the slides we're going. We have a little bit of reorganization to do with the slides, but everything will be posted up on on the website and also everything is accessible through the Facebook link.

D

A resource a calm long ago, you don't know our website. Imagine we need to know who you are not yet happy man I mean, then you arranged all of it after the Javadoc, sorry, Facebook, gotta, say I. Think.

B

Gusta mom has got some plans for the tea OTS to collect data next week, but I want you to work really hard with Kevin as quickly as possible. To finalize these, for all four of the case histories are not Soviet.

D

Along with that now so funny, my son I wanna find a PC out of local to buy Bureau activity where corner from your wounding at a time for local cabinet. Another possibility missus in Hershey bar a and a little bit on it.

B

And in in capita is especially they're going to drill and there is still an option we talked to us among yesterday, and you know if the geophysics said that the drill hole should be. You know thirty meters this way or that way from where they had initially planned. That might actually be possible, so I think, okay, so I think there is an opportunity here to work very hard on the capita data and to make an interpretation and do the best we possibly can to a help spot the dribble or B.

B

If they do drill the hole to have that so that we can confirm or not with the geophysics.

D

Time, I'm and I'm a cushy night, this rate, Thank You senator, came along I was in Akashi block return and suni caiva right to make a blue eyes about the interpretation that terms of two-month okay to master, a catcher and a rest of me, Hollie Wakeham and, as our interpretation imagine, interpretation right. These are modified and in.

B

Uk is it you go, there's I mean there is the well there and it seems to be deep at 50 meters, and you know we need to look carefully at the geophysical data and what the real, what the ground is and see, make sure that we can reconcile these these to the geophysical inversion result and the real result.

D

Ja, ja, Rule, a nice shape. You know.

D

B

When we go back to Canada, we plan to continue to work with everybody here and with with Kevin and to maybe help a little bit more with some of the inversions to make sure that they are the best possible results.

D

The Babylonians are opening up your pieces, ready yep I got she the Becca bandit to see some of the outtakes that bit off its not be so much about it, because.

B

There's some things that are interesting and maybe important in capital. If you remember our line was not was not straight but kind of went off in a big curve like this. So that's not. That was not a straight line so.

D

God said you know, comedy puppy. Tell me a little bit: I, don't want straight Mahalo quickly and.

B

So we don't know is that going to cause some effects in the 2d inversion. If we assume that this is a 2d, a 2d earth structure, with a straight line acquisition, are we going to have artifacts, because our line is curved.

D

B

Yeah, so we we're assuming that our data required on a straight line but they're actually acquired on a curved line. So does that make artifacts in the inversion.

D

Base, we are a chop suey, but you know: cameras have been a waste I bitanga example: Oh daddy, the inversion of the command got my goddamn high unit by night, velocities out MIDI and.

B

Something else to be mindful of is that in the near surface: okay, so for going along in the near surface, and even if there's, if there's changes in in the near surface, we can still maybe get good results as as we're going along.

D

Yummy bomb is, you know.

D

B

If the, if the earth is not two-dimensional, but maybe three-dimensional about the reading, an essay a.

D

B

Then, if I'm, if, if I'm doing a straight line across here so I'm doing a 2d survey, I'm assuming everything is the same in this direction,.

D

But do these straight lines of it yeah yeah a direction that goes in it, a man who sees not Haredi media.

D

Ultimately, but.

B

There's your extra structure, that's off of this side, so that it's really three dimensional, then that might also cause a distortion or artifacts okay. So so we saw the difference if we had a laterally varying earth yep in Hongzhang park right. So we had it structure that looked like that heard me so.

A

We're doing a line that's coming out of the page, so our line is this way and we've plotted a point directly below our line, but that could be over here or over here. If there's lateral changes.

D

A

Does anybody understand that here's.

C

The lines in Devon.

A

Here's our line there may be changes to the side. All.

D

The girls are not so nice when I thought I covered it with mine, so like they're moving this way, I did that man so that the manga model we needed how I borrowed that may be, but I'm down on it. If it turns out today, damn water, we need to improve that needs half cell all right. If it sounds of down whirring sorry in it. So.

A

We plotted our data and said: oh, it's 50 meters, it's very conductive, so.

D

Gonna be about 50 meter amalia contacted today and resisted be negative or whatever. No, but.

A

Maybe there's a structure over here, that's very conductive.

D

The oedema out the other day mastered a beam. Batangas Emma was at the time open it for bedtime. I'll activate somebody now, as you need a halogen or.

A

Over on this side, maybe it isn't directly below the.

D

A

D

I've seen here, look at them yeah, so.

A

That's the 3d effect.

B

So when remember, when we went to on sank park, we first of all did a sounding and not only located, and that in that we said, everything is just a layer.

D

It's a layered.

B

Earth but then, when we went and did 2d, we found out- oh it's resistive over here and conductive over here. So it's changing. Do.

D

You know the guys that all over my resistance have my there is yeah, but you only need.

B

A but sometimes things could be even three-dimensional. We have a great big block of something over here and nothing over over here. So that means that even the 2d assumption is not right.

D

No 3ds with a block of cement, if I'm a machining, my mama, she will appear, and so.

B

That is something to be mindful of, and in some cases like you goo remember, we now have a line of data this way in East West, and then we also have a line of data in in the north in the north south. So.

D

B

That gives us an opportunity to see if we can have a consistent interpretation for what the what the geology is. I.

D

Might see a Jordan a time balloon emulator now.

D

B

To investigate whether you know the 2d assumption is fine or whether we need to even think about things that are more complicated and go to stage 5 as Max's, which would be yet another complication of going to 3d.

D

D

If I see this right, no.

B

C

B

Extra complicated.

B

Anyway, those are those are things to kind of think about right. We've. We think we've gone from a sounding okay, in which we think of the earth is just being flat to two-dimensional, okay, which is much indeed right, but maybe in some cases the earth is even three-dimensional. So if we interpret it just in two, then there still might be artifacts.

D

I'll be on the 3ds or majid negara duty, table-turning, God or interpretation of the cutter interpretation Monica.

D

B

Those are cautionary things but I think the my sense of what I've seen this last week is I've. Seen a tremendous growth in the technical capabilities of the T OTS.

D

In technical abilities, yeah yeah by say on CDs at all,.

B

If you think of where you were a couple of weeks ago, as far as what you could do with acquiring DC data and how you understood the data and how you could collect and process the data, you are far more advanced now a couple weeks ago,.

D

B

Now even look at today, so you had a case history of.

D

Day to day cases we don't know, maybe that.

B

You just collected on Wednesday.

D

Wednesday would locate a case history, okay,.

B

Yeah and and now you've made a document that you can interact with document.

D

A yeah Bobby documenting an Atlanta step. You know so subway how many landed big Wahby, yeah.

B

And so people can share and then you have a way of archiving all of the information about that case history. So.

D

Who did already nearby as well.

D

Mom is right, come on Bobby, so.

B

That makes it reproducible and it allows further growth for that particular case. History. As more information comes on and.

D

Then and then it neighbor zero information a day. That's you know, but.

D

Tell my mother is okay, but I'm and.

B

I think you need to start thinking about yourselves as a group, not.

D

Illegal, do you Emma's? Oh wait.

D

B

Are connected to the Myanmar hydrogen Physical Society follow.

D

Me Allah, except Allah, is the hydro geologist, energy physics, society.

B

Yeah so you're all a part of a special group that includes all the t OTS here.

D

B

Maybe more importantly, it also includes other people like Max Kevin, soggy, Lindsay, myself and all of the people back in North America that are developing open source software, open source.

D

Software I love looking at it so.

B

That's the thing to think about you're you're, part of a group and everything that you can do to contribute to the quality of material that is done in that group enhances the whole group. Everybody wins.

D

Quality down Electrical BtoB serenity, that is not a low boom on the level of day or night I'm, a mover which we are not known, and the.

B

Thing about being part of a group is that and I think you can see it even as you were out in in the field. If there was one person who had to do you know one thing: only there is a big chance. He could make that a mistake. Hey.

D

Saying I see like a luthier God feeds in a you know, a mile of the Kudus of malaya, the Coulomb I, look at me say no for.

B

Instance, working with the Cisco and just programming that up just working with the Cisco.

D

B

If there was only one person there, the chances of that survey being completed correctly are small, so.

D

I make I mean I mean the lower the Amana beneath the kuat Maura do believe it or not. That may tell America.

B

But if you get three or four people, each person knows something right and then one person tries to do something and the other says no. No, no, no! It's it's! This.

D

Because they share a guitar or a mic in the bottom, so.

B

As a group, you are very strong well.

D

As I know, move it up and.

B

That's what your hydrogen physics group is with all of you here and all of the people in North America. You should always think of any problem if be solved as a team as.

D

I'm with you, the Canadian mess you didn't about. A new movie for, like louis salami daddy, sit up not easy to do for occasion and.

B

As you're working through over the next couple of months acquiring data and making case histories, if there are things that come up from a technical viewpoint, you have a whole team of people who can develop computational resources or maybe help you out with solving particular problems. Developed.

D

App you don't feel maybe never the rockiest reading element is really yummy. Tell me an update, comma. The point like for me I just want it what you did I'm an LED children I can get to the night that she got 9a. She like mother, Olivia Allen, you suing a through D, must say: machinima premier say me imbruvica alluvium. Yesterday we are a so.

B

That's really what I want to say: I want to I want to thank all of you for coming and spending so much time and really investing yourselves in coming here. Kevin Devin max myself, soggy Lindsay, we're we're so excited about the potential for having some real progress done with using geophysics and for helping the water situation in Myanmar. The.

D

Food, the quality through quite a tamale and Casino shangela blue foundation, ominous the karate baby, relatability monogrammed, new nobility neonatology selected male, so yemaya yemaya and the table column, lime, laser Oh, yummy, yummy, Romano comes on your immediate and.

B

With that good luck and Kevin's, your boss, so don't forget.