[email protected] wrote:
James Lux wrote:
Ah.. That's easy.. Pretty much every satellite in orbit derives its transmit
frequency from a crystal oscillator, either a TCXO or a OCXO. So all you
have to do is pick a LEO satellite that is easy to receive and measure the
transmitted frequency, and that is at a frequency where other effects won't
dominate (ionospheric uncertainties, for instance, probably rule out VHF and
UHF downlinks).
Hi James,
that's easy for you at Nasa! You have rotary antennas, good receivers and so
on...
I thought to GPS sats because there are cheap receivers all around, and hoped
the 1 PPS would tell something, so freeing me from considering doppler, relativity etc.
Anyway, please let me know if you find any easily detectable signals that doesn't
require a tracking antenna.
GPS will not help you at the PPS level, but you can avoid the tracking
antenna anyway. The doppler-stuff and alot of other things is very well
described. It is not hopeless, but not a very easy feather out of the
hat thing.
Cheers,
Magnus
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