Jim Lux writes:
> But another poster did comment on "why not use the telescope" you could > precision point to a series of stars and calculate using celestial nav > where you are. Although, that might be painful to the 1 meter sort of > accuracy - the "tables" probably don't really account for deviations from > ellipsoid and so forth. I took a shot at this recently, using the optical signal available from GPS, Project Echo style: http://fer3.com/arc/m2.aspx/Navigating-with-GPS-optically-PeterMonta-jan-2018-g41217 It would be difficult to get to 0.3 meter, though. More like 15 meter single shot, maybe 5 meter with averaging. As the other responses point out, this is routine for GNSS surveying. A few hours of dual-frequency GPS data is enough for accuracy of a few centimeters. If reference stations such as CORS are available, the "rapid static" solvers cut the needed session time to 20 or 30 minutes. Set up a reference mark in a clear area, get its position, then use a total station to do optical ties to other local marks like the telescope mount. Cheers, Peter _______________________________________________ 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.