"Bill Ogden" wrote in message
...
Please do not think you are getting something for nothing with an
interferometer. In radio astronomy you have a large number of RF sources
(stars and other interesting objects) transmitting at more or less the
same
frequencies. The trick is to select the same source signal for phase
analysis.


Bill W2WO



Seems to me there are two things of major concern. 1- getting close to the
target and and 2- phase wrap.

Anyway...
How do they actually distinguish phase in the GHz range between two dishes
across the country/world? I heard they use recordings, but that can't be
right since they'd need pico second timing accuracy...

73, Steve, K9DCi