[aprssig] Field Day ISS APRS Contacts? Doppler
noskosteve at yahoo.com
Thu Jun 21 22:20:38 CDT 2012
--- Bob Bruninga wrote:
> And remember TX Doppler is in the opposite direction of RX Doppler.
Doppler shift is the same in both directions, but on the ground we must do all the corrections. In order to reduce some of the confusion, I recommend rewording the above slightly:
And remember, your TX Correction for Doppler is in the opposite direction of RX Doppler shift.
So you need 5 memories:
> RX 437.560 TX 437.540 Approaching
> RX 437.555 TX 437.545
> RX 437.550 TX 437.550 Closest point
> RX 437.545 TX 437.555
> RX 437.540 TX 437.560 Receeding
73, Steve, K9DCI
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