>From <http://www.gps.gov/systems/gps/space/> Block IIA: 3 operational Block IIR and IIR(M): 19 operational Block IIF: 9 operational so they should be 31 satellites working.
On Fri, Jul 10, 2015 at 7:20 AM, Magnus Danielson <mag...@rubidium.dyndns.org> wrote: > Well, you would think so... > > There is 37 PRN codes, of which the top 5 is for testing. > However, in the modern ICD: > http://www.gps.gov/technical/icwg/IS-GPS-200H.pdf > you will find that there is an extended set of PRN codes, and for the C/A > code the modulation is the same, just that the transmitted PRN is shifted. > This extended system can hold 64 active birds in the constellation. > > Cheers, > Magnus > > On 07/10/2015 03:19 AM, Mark Sims wrote: >> >> The GPS system is pretty much limited to 32 active satellites. There are >> currently 29 satellites broadcasting usable navigation data. Plus some >> WAAS signals from geosynchronous orbit. >> _______________________________________________ >> 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. _______________________________________________ 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.