2011/9/13 Miguel Gonçalves <m...@miguelgoncalves.com>: > Hi all! > > I am installing a timing GPS unit over a new location where I already have a > NMEA GPS with PPS (let's call it unit A). The NMEA GPS is logging every 16 > seconds its GPGGA string.
The Oncore UT+ can does it's own site survey automatically. That's the best way. You can only compare the GPS location with Google if both are using the same "system". The most common one today is WPS84 but you need to check. The problem is that the Earth is not a Sphere and different systems assume non-sphere shapes. Getting this wrongs gives about the size error you observed, more or less. Also, can you really trust Google Earth as an authoritative source? I'm not sure. An interesting test would be to go find a USGS benchmark or a section marker near you then enter it's location into Google. See if Google hits the marker. -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
