Magnus, I believe that he is referencing the the new L2 C/A code, which is not protected. Reference http://www.gps.gov/systems/gps/modernization/civilsignals/
Michael / K7HIL On Thu, Jan 16, 2014 at 2:04 PM, Magnus Danielson < [email protected]> wrote: > On 16/01/14 20:29, Hal Murray wrote: > >> >> [email protected] said: >> >>> The real benefit of dual-frequency is you can do post-processing with >>> PPP. >>> Javad has some modules but they start at 3 kUSD - if anyone knows of >>> hobby >>> level priced L1/L2 receivers that can produce rinex-files for PPP >>> processing >>> that would be interesting! >>> >> >> Has anybody considered doing it in software? >> >> If I wanted to play with that sort of stuff, is there any particular SDR >> hardware package/project that would good to start with? >> > > You want P(Y) capable receivers, which means 20,46 MHz bandwidth on both > L1 and L2 bands. You want say 12 channels. Lots of raw sample data to > crunch on in real time. I'd say that you would really like to mimic the > traditional style of doing the mechanical stuff in HW/FPGA and then do the > remainder in some suitable processor. > > Going from C/A to P(Y) is a bit challangeing on it's own, as you where not > supposed to be able to do that, only to get the P code. > > Cheers, > Magnus > > _______________________________________________ > 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. > _______________________________________________ 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.
