On Wed, 25 Apr 2018 18:02:53 -0400, [email protected] wrote: > time-nuts Digest, Vol 165, Issue 50 > > Message: 3 > Date: Wed, 25 Apr 2018 10:19:38 -0500 > From: Dana Whitlow <[email protected]> > To: Tom Van Baak <[email protected]>, Discussion of precise time and > frequency measurement <[email protected]> > Subject: Re: [time-nuts] nuts about position > Message-ID: > <CADHrwpdYA=fyzx+1s32nok--wzidk0g8kca1fpvky9o6ukt...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > While I was at the Arecibo Observatory it became desirable to get a good > surveyed position > for a new GPS antenna we had installed for the NIST TMAS system. We found > a resource > at the Univ of Puerto Rico who had a Trimble (I think) unit. He set it up > on the site, "turned on > the bubble machine", then left it alone for about two hours. He returned > the estimated > position a few days later, expressing high confidence that it was good > within about 8 inches. > > I'm sure I asked him if this machine used both L1 & L2, but don't recall > his answer. I suspect it was "yes".
It will have been using carrier phase only, not the L2 modulation (which is encrypted). Although one can do correlation on the L2 modulation from a given satellite in common view as well. Joe Gwinn _______________________________________________ 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.
