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[aprssig] K6RPT-12 Balloon Seems To Be Having GPS Problems

Greg Clark k7rkt at bigredbee.com
Mon Dec 3 15:38:35 UTC 2012


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.

Greg K7RKT


On Mon, Dec 3, 2012 at 7:18 AM, Stephen H. Smith <wa8lmf2 at aol.com> wrote:

>  I started seeing this late last night Eastern Std Time, but it's getting
> more severe.    Wierd branches of the track line of K6RPT-12.     You can
> see them here:
>
>      <http://wa8lmf.net/map> <http://wa8lmf.net/map>
>
> When you see the color-coded-by-altitude path here:
>
>     <http://wa8lmf.net/livetrack> <http://wa8lmf.net/livetrack>
>
> it's more obvious what's happening.  The GPS receiver onboard is shutting
> down momentarily or resetting, causing the position fix to "hiccup" as it
> restarts.  Additionally, it apparently is coming back up in 2D mode,
> causing the apparent altitude to drop to zero before recovering to a 3D fix
> with the 100,000 ft altitude reading.
>
> (The track line is black for reported altitudes below about 10,000 feet,
> while the normal 100,000 foot level yields an orange-to-yellow line.)
>
>  ------------------------------
>
> --
>
> Stephen H. Smith    wa8lmf (at) aol.com
> Skype:        WA8LMF
> Home Page:          http://wa8lmf.net
>
> High Performance Sound Systems for Soundcard Apps
>    http://wa8lmf.net/ham/imic.htm
>    http://wa8lmf.net/ham/uca202.htm
>
> Vista & Win7 Install Issues for UI-View and Precision Mapping
>     http://wa8lmf.net/aprs/UIview_Notes.htm#VistaWin7
>
> "APRS 101"  Explanation of APRS Path Selection & Digipeating
>   http://wa8lmf.net/DigiPaths
>
>
>
>
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