Shaun, With a short baseline of a few km, this should be doable. You might want to contact Rick Hambly of CNS Systems ( http://www.cnssys.com/ ) who has done a lot of work in this area, including calibrating GPS receivers at USNO.
Do you need absolute synchronization against UTC, or just relative synchronization among each of several sites? Depending on how quick you need the results, I think many GPSDO such as Z3801A may not give you this level of accuracy, either in absolute or differential mode. But a plain GPS timing receiver might be able to do it. I have a similar need this summer and plan to use sawtooth corrected M12+ GPS receivers with identical antennas and cable feeds. By co-locating all the antennas in a one-time trial experiment you can determine the fixed receiver offset of each unit, which you then subtract for all subsequent runs. The other time-honored approach, of course, is carry a Cesium clock between the sites. Since the sites are located within a few minutes of each other a good cesium will hold 5 ns. /tvb http://www.LeapSecond.com ----- Original Message ----- From: "Shaun Doughty" <[EMAIL PROTECTED]> To: <time-nuts@febo.com> Sent: Monday, August 08, 2005 05:24 Subject: [time-nuts] Synchronisation using GPS > Hello, I am currently looking at GPS as a possible way of synchronising > transmission/reception within a radar network. I was wondering if anyone > had perhaps previously used GPS to synchronise various locations in this way > (mine will likely be a couple of km apart max) and if there were any > recommended receiver models that might be suitable for this purpose. > > Ideally something approaching differential location accuracy of <1m with > synchronisation error between receiver locations of <5ns would be do-able; > has anyone ever undertaken anything similar? > > Shaun > _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
