On Montag, 2. März 2020 13:14:55 CET Anton Moehammad via time-nuts wrote: >2. In the UCenter or almost any software > control for GPS module/receiver we can find data for next pps, why if the > software can calculate the PPS should be they do not use it to adjust the > PPS output so the PPS jitter is minimal ?
There are no clocks in a GPS receiver with picoseconds resolution and everything the GPS outputs will be naturally restricted to its internal clock granularity. The time pulse signal from a Ublox module can therefore only be accurate to tens of nanoseconds (around 20ns assuming an internal 48MHz clock). However, the time solution calculated by the receiver will be much better. The quantization error reported in the TP5 message can simply be added to the timestamp of the received pulse to calculate its true arrival. BR, Matthias > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow > the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
