Hi When asked about the difference, that's not what the people who wrote the code had to say about it….
Bob On Dec 30, 2012, at 7:56 AM, Azelio Boriani <[email protected]> wrote: > and maybe that reflashing a 1uS nav receiver to have a 100nS timing > receiver is related only to firmware improvements. Accurate timing is > mandatory for accurate position/navigation. The CW12 timing receiver has a > position hold mode that can't be turned off but always gives the computed > position. > > On Sun, Dec 30, 2012 at 12:50 PM, Magnus Danielson < > [email protected]> wrote: > >> On 30/12/12 10:06, [email protected] wrote: >> >>> Hi Magnus, >>> >>> 2) Timing versions might get an upgraded oscillator. Maybe a TCXO >>>>> instead >>>>> of a standard XO. >>>>> >>>> >>>> Don't think so. The noise and systematic stability is as important for >>>> positional as for timing versions, the timing version can benefit of the >>>> fixed position. >>>> >>> >>> Look at the uBlox6 lineup. Position receivers are available with XO or >>> TCXO - timing only with TCXO. >>> >>> http://www.u-blox.com/images/stories/linecards_u-blox_gps_modules_2012.pdf >>> >> >> In that case they are the first to do it to my knowledge. >> >> None of the Motorola receivers did it as I recall it. Could be that the >> price of the modules is now so low that the difference make sense. >> >> Notice that producing higher navigational rate is easy if you have the CPU >> power to do it, and todays receivers have higher CPU power than they used >> to, so doing 10 Hz navigation rate isn't unfeasable, so it does not need to >> be Kalman filter predictor results. >> >> 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. _______________________________________________ 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.
