3 ms·
Something like that might work. I am surprise that the temperature stabilized local oscillator is so cheap. Care to share a link? The other thing that can help
by petschge 6y ago
Something like that might work. I am surprise that the temperature stabilized local oscillator is so cheap. Care to share a link?
The other thing that can help is to put receivers not too far apart. Say 25 dishes in an area with 100 meters diameter. That improves sensitivity by an order or magnitude, resolution by two orders of magnitude and the station can either be connected with a clock network, or (if using GPS) will at least see correlated clock errors that don't matter much in the correlation. The 1 part in 10^-7 accuracy of the GPS receivers is plenty accurate for the phase folding.
- brandmeyer 6y agoWe've measured Milliren 220 series to be about 5e-12 at 10 seconds, but that's not fair since it turns out that part is "call for quote", even if we only bought it in small qty. Conner-Winfield OH320 advertises an Allan Deviation of 2.7e-12 at one second. Its a very similar part, without all the hirel and space qualifications. 98 USD/ea at Digi-Key. I agree wholeheartedly on the low-baseline setup case. An offline carrier phase position-time solution could stretch you out to much wider baselines, though.