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Test of APRS tracking Adam’s Farm, Walpole, MA, US May 26 and June 2 1, 2013. Equipment. Kenwood TH-D72A Diamond SRH77CA extended hand held antenna Kenwood TM-D701A AvMAP GEOSAT 6 APRS GPS unit Garmin GPSMAP-60CSx. Procedure. Walk the 2+ mile Adam’s Farm north loop
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Test of APRS trackingAdam’s Farm, Walpole, MA, USMay 26 and June 2 1, 2013
Equipment • Kenwood TH-D72A • Diamond SRH77CA extended hand held antenna • Kenwood TM-D701A • AvMAP GEOSAT 6 APRS GPS unit • Garmin GPSMAP-60CSx
Procedure • Walk the 2+ mile Adam’s Farm north loop • GPSMAP-60CSx taking track data • Kenwood TH-D72A sending position data • Two tests • No fillindigi support • Fillindigi support from Kenwood TM-D710A • Maximum airline distance from TM-D710A: about 0.7 miles
APRSISCE with Topo and GPX overlay from GPSMAP-60CSx tack data
Comparison of GPS track, tack with no fill in digi, and track with fill in digi
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Conclusions • To provide robust tracking for foot traffic in the Walpole area fillindigis are recommended if not required • The Kenwood TM-D710A was determined to provide good fillindigi capability over an approximately 0.7 mile radius • It is recommended that an antenna better than the stock rubber antenna be used • APRSISCE can accept the GPX track data and provide a clean mapping of the foot mobile traffic overlaid over this GPX track data • This suggests that GPX tracks of critical off road environments should be captured prior to their need during an incident