It's identical hardware and firmware (obviously not the same unit!)<div><br></div><div>Greg</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Dec 3, 2012 at 10:51 AM, Steve Noskowicz <span dir="ltr"><<a href="mailto:noskosteve@yahoo.com" target="_blank">noskosteve@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <br>
<br>
Thanks, Greg,<br>
Is the payload similar to CNSP-11 that made it to the Med?<br>
<br>
73, Steve, K9DCI<br>
<div class="im"><br>
<br>
--- On Mon, 12/3/12, Greg Clark wrote:<br>
<br>
<br>
There is some evidence of the entire system resetting.<br>
<br>
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.<br>
<br>
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<br>
<br>
<br>
Then at time 13:39:02 it gets new coordinates and an altitude of 102174.<br>
<br>
<br>
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. <br>
<br>
<br>
Greg K7RKT<br>
<br>
<br>
<br>
On Mon, Dec 3, 2012 at 8:13 AM, Stephen H. Smith <<a href="mailto:wa8lmf2@aol.com">wa8lmf2@aol.com</a>> wrote:<br>
<br>
<br>
<br>
<br>
On 12/3/2012 10:38 AM, Greg Clark wrote:<br>
<br>
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. <br>
<br>
<br>
Greg K7RKT<br>
<br>
<br>
How could it EVER get fewer than 4 satellites at 100,000 feet? <br>
<br>
</div>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>
<div class="im"><br>
<br>
<br>
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