Thanks Chris. I always appreciate clear explanations. I'm assuming that the "fixed location" requirement is important to note for purposes of compensating for any dopler shift, as well as the distance the signal must first travel before being decoded.
... I would presume that the fixed location used for above calculations would be relative to the position of the antenna? I read somewhere that even compensating for the length of the antenna cabling is important? This is all so exciting. Thanks everyone. On 8/21/2012 2:01 AM, Chris Albertson wrote: > On Mon, Aug 20, 2012 at 3:10 PM, Sarah White <[email protected]> wrote: > >> >> I really like that the thunderbolt can (assuming the initial location >> has been uploaded, or the default "site survey" has been completed) >> still keep accurate time / discipline based on a single satellite lock >> (before falling back on the ovenized crystal in pure "holdover" mode) >> >> > All timing mode GPSes can keep time with one GPS sat in view. It works > becaus ethe GPS "knows" it is not moving. and it has the exact location f > the one satellite. > > Holding over when there are zero satellites is not standard and required a > good local oscillator. You can built one froma cheap $20 timing GPS and a > OCXO and some logic chips. The t-bolt is a GPS with a built-in GPSDO. > > Chris Albertson > Redondo Beach, California > _______________________________________________ > 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. > _______________________________________________ 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.
