[time-nuts] Newbie Question about GPS

[Anton Moehammad]

Hi All,I hope some one can help me to find the answer.1. Let say some one can extract the L1 carrier frequency 15xx MHz and convert it down to let say 1MHz and put it to phase comparator and made the PLL to generated the LO to convert and extract the carrier. Is this possible ? Have some has do it ? Can share any thoughts ?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 ?3. Why if we use real time RTK for better accuracy in term of position the PPS is not changed ? ( At least in my setup) ?Are the RTK software only process data and show the result in the screen without change anything in module/receiver ?Any software can do a real change to receiver for better PPS out based from any corrections available ?
Thank YouAnton