jab...@quasarfs.com said: > The mobile station can be synchronized to GPS initially to synchronize its > clock as described above but will then have to rely on a free-running > oscillator. The stability of this oscillator will dictate how much drift the > mobile station's clock will experience relative to the reference stations. > Keeping this drift as low as possible is my goal.
Don't get hung up on the "D" idea. There are many very good single oven OCXOs out there. I think you will be much happier if you figure out how low a drift you need. I'm guessing you don't have a firm number because it interacts with other parts of the system and you are still designing that part. You need some rough numbers for sanity checking your options. Typical GPSDO boxes are good for a few microseconds over 24 hours of holdover. Is that within your ballpark? You can probably do much better than their spec sheet if your temperature is stable. Do you need one for a single experiment, or many for a production run? Do you need to prove it is good-enough from the spec sheets or can you try one in the lab, and run with it if it works? My suggestion would be to get a couple of good OCXOs, put them in the lab next to your Rb, and see how well they work. It's probably worth a few phone calls to see if the vendors have any data on 12 hour holdover. (But check the environmental conditions.) -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ 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.