[email protected] wrote: > Hi: > > There are three new civilian GPS signals, L1C, L2C and L5. > http://www.prc68.com/I/DAGR.shtml#GPSs > The original civilian signal, L1 is at 1575.42 MHz (154 * 10 * F0, > F0=1.023 MHz). > f0 should really be set to 10,23 MHz. > L1C is at the same frequency as L1 but uses the code like Japan. > It looks similar to L5 actually, but coordination with Galileo, QRSS, Glonass and Compass is underway. > The new L2C signal is at 1227.60 MHz (120*10*F0). Allowing for path > length corrections. > > The new L5 signal is at 1176.45 MHz (115*10*F0). This is intended for > aircraft safety. It also has the largest frequency difference to L1 so > should also be the best for determining the path length through the > ionosphere/troposphere allowing for a more accurate time fix > Currently we have these signals: L1 C/A (from all current sats) L1 P(Y) (from all current sats) L1 M (from GPS-IIR(M) sats) L2C (from GPS-IIR(M) sats) L2 P(Y) (from all current sats) L2 M (from GPS-IIR(M) sats)
In a couple of weeks we can also expect the first transmission of L5C (from GPS-IIR(M)20 sat) It will be years before we see L1C (from GPS-III sats). > I'm hoping my Polaris Guide receiver will get upgraded firmware to get > these signals as well as have WAAS added. See: > http://www.prc68.com/I/DAGR.shtml#Pol > > Are there any new timing GPS receivers that take advantage of the new > signals? > There is a few, but they are not in wide spread. You need to look into the geodestic receiver market. Trimble amongst others have receivers claiming support. 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.
