On Thu, May 2, 2013 at 5:29 PM, Stewart Cobb <[email protected]> wrote: > GPS surveying equipment can easily determine the position of your antenna > to within a few centimeters (~20 ps). Unfortunately, such equipment is > expensive and difficult to borrow. > > A high-end GPSDO designed today should have the ability to record phase > data into RINEX files, which could be sent to a service like OPUS to find > the antenna position. > > <http://www.ngs.noaa.gov/opus/> > > But few do, so far. >
There are relatively cheap single frequency GPS receivers that output raw (code and carrier phase) measurements. If you are near a base station (e.g., [1]) that provides similar measurements, you can use RTKLIB to post process both measurements and obtain a position within a few cm. A sample plot of the position of the patch antenna outside my window is attached. The receiver is a u-blox LEA-6T, the RINEX of the base station is from an IGS station 7.2 km away. [1] http://igscb.jpl.nasa.gov/network/netindex.html
<<attachment: rtkplot.png>>
_______________________________________________ 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.
