I am working with someone who needs to have time synchronized reception of signals in various locations which are separated by less than 100 km. This is a situation similar to VLBI, but since the distances are shorter, the center frequencies are lower, and the integration times are much shorter, we probably don't need a Hydrogen Maser, and the application can't afford one.
The real question is whether we can get away with a GPS disciplined OCXO or whether we would need to use a Rubidium. Does anyone have any data on the relative frequency and/or phase errors of the 10 MHz reference out, and relative PPS time errors of any commonly available GPSDOs? Absolute error to UTC and true 10 MHz don't really matter, as long as both devices have the same error. Just data comparing 2 units with antennas right next to each other would probably be fine. The other concern, of course, is that even if both units were very close, they will be exposed to slightly different environmental conditions (different A/C settings, different cycling times, etc.). Are there any good papers discussing this subject? Any data out there? Said -- have you measured this sort of thing on the Fury? Thanks, Matt _______________________________________________ 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.
