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

mwbesemer at cox.net mwbesemer at cox.net
Mon Dec 3 10:37:17 EST 2012

Pretty interesting looking at the speed and altitude graphs on APRS.FI 
as well...



On Mon, Dec 3, 2012 at 10:18 AM, Stephen H. Smith 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 

(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 



Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
Home Page:          http://wa8lmf.net <http://wa8lmf.net>

High Performance Sound Systems for Soundcard Apps
    http://wa8lmf.net/ham/imic.htm <http://wa8lmf.net/ham/imic.htm>
    http://wa8lmf.net/ham/uca202.htm <http://wa8lmf.net/ham/uca202.htm>

Vista & Win7 Install Issues for UI-View and Precision Mapping

"APRS 101"  Explanation of APRS Path Selection & Digipeating
   http://wa8lmf.net/DigiPaths <http://wa8lmf.net/DigiPaths>


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