Let the GPS average the antenna position over a very long time. On a good GPSDO one can select the number of averages, and the position variance before the survey is finished, and the (now very precise) position is stored in memory. Indoors this may take a very long time to do (weeks?), but should work too. The problem indoors is multi path, one never knows where the signal is coming from that is seen. Setting up signal squelch in the GPS really helps with that, for example the C/No could be set to a minimum of 35dB, and anything below that is ignored so only the strongest signals are used. We made a customer's urban solution work that way, it effectively deleted all the multipath issues he had from adjacent high-rises, since the multipath signal strengths yielded about 20 to 28dB C/No and were thus all squelched, whereas the direct signals were 35 to 50dB C/No. bye, Said In a message dated 10/18/2012 08:26:07 Pacific Daylight Time, [email protected] writes:
OK, unless you have the coordinates of your antenna position... and here comes the difficult move: how can I have the coordinates of an indoor antenna that can't receive the required satellites? Starting from a suitable outdoor position then using precise length and angle measurements, yes, it can be done. _______________________________________________ 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.
