Test of APRS trackingAdam’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– GPSMAP-60CSx taking track data– Kenwood TH-D72A sending position data

• Two tests– No fillin digi support– Fillin digi support from Kenwood TM-D710A

• Maximum airline distance from TM-D710A: about 0.7 miles

Track in ARPSISCEno fill in digi

Track in aprs.fino fillin digi

APRSISCE with Topo and GPX overlay from GPSMAP-60CSx tack data

APRS.fi track with D710A providing Fill in digipeating

Comparison of GPS track, tack with no fill in digi, and track with fill in digi

Using WA1PLE-12 as a WIDE1-1 (fill in) digipeater

Pictures

002 003004

005

006

007 008 009 010 011 012

013 014 015 016 017 018 019

Conclusions

• To provide robust tracking for foot traffic in the Walpole area fillin digis are recommended if not required

• The Kenwood TM-D710A was determined to provide good fillin digi 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