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[aprssig] DGPS?

Keith VE7GDH ve7gdh at rac.ca
Mon Apr 7 20:58:42 UTC 2008


I certainly wouldn't want to discourage someone from playing around with 
DGPS, but what's the point for APRS? We aren't surveying. I did SAR for 
about 15 years... most of it before GPS receivers were cheap and 
available. Even with SA enabled, it was pretty amazing to glance at the 
GPS receiver and get a position within 100 metres of our actual 
location... within 15 metres when SA was turned off was nice. With 
better receivers and WAAS these days, it's usually even more accurate. 
If there was enough visibility to fly, even getting a helicopter within 
1 km of our location was enough to talk the pilot down. I'm not 
concerned with "what side of the highway" a station is on or "finding 
buried treasure". Seeing what direction they were travelling is enough 
to determine that in most cases. If you have DGPS, use it, but it's more 
than I need.

73 es cul - Keith VE7GDH
--
"I may be lost, but I know exactly where I am!" 





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