There is some evidence of the entire system resetting.<div><br></div><div>take a look back at UTC TIME 13:37:10, and you'll see an altitude reading of 109373, and note that for the previous 37 minutes or so the lat/lon are repeated.</div>
<div><br></div><div>When the firmware powers up, it initializes the altitude to 33,333 meters (or roughly 109373 feet). If the firmware doesn't get a valid set of coordinates from the GPS, it transmits this altitude along with the last known good coordinates</div>
<div><br></div><div>Then at time 13:39:02 it gets new coordinates and an altitude of 102174.</div><div><br></div><div>This doesn't explain the other behavior that we're seeing now, where a large percentage of the packets have an altitude way too low. </div>
<div><br></div><div>Greg K7RKT</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Dec 3, 2012 at 8:13 AM, Stephen H. Smith <span dir="ltr"><<a href="mailto:wa8lmf2@aol.com" target="_blank">wa8lmf2@aol.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"><div class="im">
<div>On 12/3/2012 10:38 AM, Greg Clark
wrote:<br>
</div>
<blockquote type="cite">I don't think it's resetting, I think it's losing
lock, or dropping intermittently into 2D mode as it gets fewer
than 4 satellites.
<div><br>
</div>
<div>Greg K7RKT</div>
<div class="gmail_extra"><br>
</div>
</blockquote>
<br></div>
How could it EVER get fewer than 4 satellites at 100,000 feet? <br>
<br>
It is clearly losing lock, whether from resets, low battery
voltage, RFI from the two-meter transmitter when it keys up (crap
quarter-wave whip without a proper ground plane??), or possibly
extreme cold at 100,000 feet. I haven't seen any details on the
packaging of the payload.<br>
<br>
<br>
<br>
<br>
. <br>
<br>
<br>
</div>
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