According to this: cedb.asce.org/cgi/WWWdisplay.cgi?80010 it seems that this GPS uses carrier phase tracking... it seems interesting.
On Tue, May 1, 2012 at 3:08 PM, Stan <swp...@earthlink.net> wrote: > On more or less of a whim, I found and bought an Ashtech 3DF GPS. The > interesting thing about this particular GPS is that it uses four separate > GPS antennas mounted in a diamond pattern about 1 meter on a side and can > compute not only the "usual" stuff, but also heading, roll, and pitch > angles. I had heard of this being possible, but never actually seen it > done. > There are no accessories included with this unit, other than the power > cord. > > Does anyone know where I can find a manual for it? > Will this GPS work with just four ordinary active antennas or are the > antennas special? > Given the complexity of the additional data massaging it does to extract > the > angular data, does this also mean that it will have more accurate position > and or timing performance? > Does it need all four antennas to be able to do anything at all, or can it > compute position and time with just one antenna connected? > > Thanks, > Stan > > > _______________________________________________ > 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. > _______________________________________________ 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.