Hal Murray wrote: > I'm picturing an open hill top at night with clear skies so there would be > lots of radiation cooling. Of course, with an open hill top, GPS recption > would be easy.
As great as GPSDO are, the problem with using them in a portable environment is the time it takes to do a survey and then get to final lock; mountain-toppers may not be in one place long enough. One thought I've had is to use a cheap Rubidium for long term stability, and phase lock a good OCXO to it for short term stability and phase noise (ie, use a loop time constant of perhaps 100 seconds). That would make a portable package that would meet both the short and long term stability requirements. John _______________________________________________ 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.
