Richard B. Gilbert wrote: [] > That is what a "site survey" is. The GPS determines its location a > few hundreds of times over the course of a day and does a "least > squares" calculation to get a reasonable approximation of your > latitude and longitude. > > Cellular phone base stations do a more extended site survey, thirty > days instead of one. This gives them a MORE reasonable > approximation. When I did my site survey (24 hours) the locations > plotted a locus about > 300 feet long in an East-West direction and with a width of about > thirty feet. > If I had had the patience and if I had required sub microsecond > accuracy I could probably have trimmed that locus further. . . . . > > It is enough, for me, that my little herd of computers agree as to > approximately what time it is.
Thanks, Richard. I took your "You do need to run a "site survey"" as something rather more involved than letting your GPS just sit there. For me, a few milliseconds is good enough, but I always want to do better.... Cheers, David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
