> On 10/2/12 2:36 PM, saidj...@aol.com wrote: >> Hello Paul, >> >> thanks much for the feedback! >> >> Yes, we think we have identified a nice combination of oscillators, GPS, >> and firmware that seems to work pretty well. The GPSTCXO units cannot be >> compared to a lower cost $150 Thunderbolt in terms of phase noise or >> stability >> of course, and they have CMOS 10MHz outputs, but then the TB's cost >> around >> $1500 new I guess. >> >> We think the GPSTCXO's and LC_XO type units will work quite well >> wherever >> standard OCXO's are used today, and power/size/weight are an issue. >> > > > Intriguing.. Can it handle the Doppler, etc., for a cubesat in LEO? > (7km/s) The total Doppler isn't usually the issue (the GPS satellites > are moving faster, after all), but the receiver may not work for high > velocities, high altitudes?
GPS SVs moves at around 4km/s, but nevertheless there are still COCOM limits implemented in nearly all receivers (never break both 504m/s and 18km height) -- Björn _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.