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Doppler correction software for linear satellites

Is there any software around which will do full Doppler correction
for the linear transponder satellites? I would like to tune around
the downlink using the VFO knob on the rig (FT-847) and have the
computer automatically adjust the uplink frequency to match
(within a couple of seconds). The 847 can track between the uplink 
and downlink, but can't compensate for Doppler, so the difference
relationship between uplink and downlink frequencies is always

Wisp with the DDE client does a great job for satellites with a 
fixed downlink and uplink, like the Pacsats and FM repeaters.

Thanks in advance,

Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>
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