Hi To bring this back to the original point - will it help?
The basic assumption (I think) was that having multiple corrections per second would make those corrections smaller. Since that's not the way short term stability and noise normally works, my guess would be not. If you have a receiver that updates 100 times a second, it's very likely that it will have more jitter (peak to peak) on the output than one running the same technology that updates once a second. Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Attila Kinali Sent: Wednesday, February 01, 2012 4:14 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Building a GPSDO & trouble using Jupiter-T On Tue, 31 Jan 2012 16:29:07 -0800 Chris Albertson <albertson.ch...@gmail.com> wrote: > I'm pretty sure those GPS recievers that send out more frequent data, > at say 2Hz or 5Hz are just interpolating. It is not more accurate. > The GPS sats only send a frame once over 6 seconds. As Magnus already wrote, once you have a fix, you can use code tracking to get an updated fix up to rates of 1kHz. If you use codeless P(Y) code tracking or carrier phase tracking you can get even higher rates. But, you can only update an already available fix, not calculate a fresh fix from scratch at that rate. This is because carrier phase and codeless P(Y) code tracking has an ambiguity of the phase, which has to be first resolved by a "conventional" fix. Once you have this, you can use those two techniques to get fixes at high rates. Attila Kinali -- The trouble with you, Shev, is you don't say anything until you've saved up a whole truckload of damned heavy brick arguments and then you dump them all out and never look at the bleeding body mangled beneath the heap -- Tirin, The Dispossessed, U. Le Guin _______________________________________________ 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.