Originally Posted By: JerryFountain
unimogbert,

I think you will find they did not use doppler, but time delay from the outgoing signal to the incoming signal. Gives you distance toward or away from the satellite. Longer interval = further away. That is why they were not able to initially tell the northern from the southern route.

Respectfully,

Jerry


Hmmm. Probably right. Interesting problem since the transmitted signal may not be to Cesium standards in its timing. But all you'd really need is 2 or more satellites timing the same ping and working out the differences in delay/geometry/satellite location.

Thanks.