Interesting thanks !
----- Original Message ---- From: Gary Chatters <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Sat, November 21, 2009 2:57:15 PM Subject: Re: [time-nuts] OT - GPS and North Mark Spencer wrote: > Would Time Difference of Arrival techniques combined with an array of four > closely spaced antennas work with Gps signals as a means of determing the > orentation of the antenna array vs the gps satellites ? (I'm thinking > traditional TDOA techniques may not work with gps signals.) > There are commercial products available: http://www.hemispheregps.com/Default.aspx?tabid=379 http://www.hemispheregps.com/Default.aspx?tabid=412 These devices claim less than 1 degree RMS heading accuracy. Here the antennas are integrated and a fixed 0.5 meter apart. They do (or did) make a board that could be used with separate antennas, but I can not find it right now. I have no idea of how the math works for computing heading. Gary _______________________________________________ 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. __________________________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now http://ca.toolbar.yahoo.com. _______________________________________________ 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.
