On 3 Jul, 2013, at 11:47 , Bob Camp <[email protected]> wrote: > The pipe in this case is up on one frequency and down on another. The > conversion oscillator on satellite that's the weak link, no matter how good > the signal from the ground happens to be.
That's certainly true but it doesn't seem like a problem that the presence of a high stability free-running oscillator, like a rubidium, would help. The oscillator on a geostationary satellite has a continuous frequency reference to lock to (the uplink carrier) and hence only needs short term stability sufficient to track this and transfer it accurately to the downlink. It seems like this is the kind of problem that quartz excels at. Dennis Ferguson _______________________________________________ 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.
