I want to thank everyone for their answers. I was sure I had the geometry right and that the additional latency would make the position "fuzzier" because I kept thinking that the clock was absolutely correct.
Of course, the clock in the GPS receiver converges on a time that is offset from absolute time by the delay in the cable. This time offset is equal and opposite to the extra path length for each satellite's range, thus ensuring that the position calculation is independent of connecting cable length. So this corrects for the (apparent) path length error but still leaves a clock offset error which is then corrected by the cable length input value. I get it now. Thank you all very much. This is something that has bothered me for some time and finally seeing the solution makes me feel a lot better about GPS installations in aircraft. -- Brian Lloyd, WB6RQN/J79BPL 706 Flightline Drive Spring Branch, TX 78070 [email protected] +1.916.877.5067 _______________________________________________ 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.
