Hi Said, That may be, but I think he indicated he was using the common hobby type units. I seriously don't think they measure up to your unit. I should have stated I was speaking specifically about GPS by itself not using differential methods.
Your comments are noted, however. Thanks, Bill....WB6BNQ [email protected] wrote: > In a message dated 2/19/2012 21:21:35 Pacific Standard Time, [email protected] > writes: > > Doing a few fixes for 30 minutes will, under best conditions, get you > somewhere on a circumference around your location with a radius of 15 meters > (50 feet). For GPS to get a useful coordinate result with meaningful data > will take longer than 30 minutes or so. Typically, you would want to do a 48 > hour âsurveyâ of your position to try to achieve a 3 to 5 meter > resolution. However, that only gives you an idea of where the GPS antenna > was > Bill, that may have been true for some older commercial GPS receivers, but > not for the newer high performance receivers. > > We did "flight testing" of our FireFly-IIA unit fed from a GPS simulator, > and the results are: > > better than 0.8 meters horizontal accuarcy rms > better than 2.1 meters vertical accuracy rms > > This was then verified in a Turboprop airplane. This was in the USA with > WAAS being active. > > 30 minutes should be more than enough to get a position with the above > accuracy at very high confidence levels. > > bye, > Said > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
