Peter Try browsing chapter three here- http://www.gmat.unsw.edu.au/snap/gps/gps_survey/principles_gps.htm
I have trouble getting my head round some of this stuff as well and found it a useful read. DaveB ----- Original Message ----- From: "Peter Vince" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Tuesday, February 20, 2007 10:58 PM Subject: Re: [time-nuts] Carrier phase tracking > >>I don't wish to offend, but that is totally wrong. Even if every >>satellite were on the exact same frequency, with the exact same >>doppler, and the exact same direction, you would still have no >>problem >>separating the carriers of the multiple satellites. The reason is >>that the satellites do not transmit carrier. Here is how: >> >> Everybody here understands how the PN codes are tracked by >>despreading. The despreading operation is multiplication, and when >>you multiply the PN code by the original signal you get a carrier, >>only from that one satellite. > > Do you? Or do you just get the modulation? > > Sorry if I'm being naive, just trying to get my head around this > thorny topic. > > Thanks, > > Peter > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > > -- > Internal Virus Database is out-of-date. > Checked by AVG Free Edition. > Version: 7.5.432 / Virus Database: 268.17.38/684 - Release Date: > 13/02/2007 17:10 > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
