Try this link www.serc.iisc.ernet.in/graduation-theses/babu_09.pdf seems interesting
On Wed, Feb 1, 2012 at 1:44 AM, Magnus Danielson <mag...@rubidium.dyndns.org > wrote: > On 01/02/12 01:29, Chris Albertson wrote: > >> On Mon, Jan 30, 2012 at 6:17 PM, Didier Juges<shali...@gmail.com> wrote: >> >>> You have to spend good money to get a GPS receiver capable of calculating >>> it's time and/or position more than once per second. I am not aware of >>> that >>> being done for timing applications, but it is available for navigation >>> GPS >>> receivers, such as those used to track race cars (for a race car, one >>> second is an eternity). I have seen navigation receivers capable of 10 >>> fixes/second, I am sure there are better ones yet. They cost a lot of >>> money. >>> >> >> 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. >> >> They send at higher rate so that the system using the GPS does not >> need to know how to dead reckon and can have decent results for simply >> using last reported position >> > > The frames does not relate to the rate of raw-data or solutions. You could > track every 1 ms, as it would align with the rate of a full C/A code cycle. > Typically these are integrated into complete sub-code symbols, of 20 ms or > 50 bauds, so it is not unfair to see that rate of raw-data. The solution > can be run as often if CPU time for all the calculations are there. The > ephemeris data is designed such that it doesn't need to change often and is > re-transmitted regularly, so those bits isn't immediately used for > navigation solution by necessity. Their phase is however important. > > Cheers, > Magnus > > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<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.