<div dir="ltr">Jules,<div><br></div><div>Very interesting! </div><div><br></div><div>I'm curious what effect we might see burying the sensor completely, say below the frostline:</div><div><br></div><div><a href="https://www.hammerpedia.com/frost-line-map/">Frostline Map</a><br></div><div><br></div><div>This would make deployment more difficult, but would surely provide significant stability. </div><div><br></div><div>But what does it do to magnetic field lines? - one more experiment that I would like to try sometime: place several sensors in a vertical column at, say 500 cm intervals in a fairly uniform deposit of soil.</div><div><br></div><div>Seismic interaction is something I hadn't considered.</div><div><br></div><div>Dave</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 12, 2020 at 1:21 PM Julius Madey <<a href="mailto:hillfox@fairpoint.net">hillfox@fairpoint.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<font face="Arial">Dave, <br>
Did a 13 hour run from 2300edt yesterday to noon today and then
started a second run to complete 24 hours. Seeing a slight 0.3
degree upward shift in temp over the 13 hours. The sensor results
are not flat line and still show some drift with an initial
relatively rapid change after starting the run ... have to see if
the same thing happens on the run in progress now. <br>
Some activity around 0400edt to 0900edt which I can't explain as
magnetic field shifts, at least according to the data from
Intermag. Might be seismic activity related as any movement of
the sensor could also create a 'signal' in the low nT range
(~50nT).<br>
Jules<br>
<br>
</font><br>
<div>On 8/12/2020 10:26 AM, David Witten
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Jules,
<div><br>
</div>
<div>I will look closely at this when I get back from my
appointment this am. THere are definitely some untested
'features' here. </div>
<div><br>
</div>
<div>Dave</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Aug 11, 2020 at 9:49
PM Julius Madey <<a href="mailto:hillfox@fairpoint.net" target="_blank">hillfox@fairpoint.net</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> <font face="Arial">Dave, <br>
I think we're OK operator error here with parameter
formats .... <br>
Sorry for the false alarm<br>
Jules<br>
<br>
</font> </div>
</blockquote>
</div>
</blockquote>
<br>
</div>
</blockquote></div>