[aprssig] Field Day ISS APRS Contacts? Doppler
kc6ete at gmail.com
Wed Jun 20 13:52:23 CDT 2012
How can they be in opposite directions? ?
Bob Bruninga <bruninga at usna.edu> wrote:
>> I have made a few attempts and managed to copy one
>> weak beacon packet. I was at 437.550 +- doppler.
>> It is not easy like the vhf packet was.
>And remember TX Doppler is in the opposite direction of RX Doppler. 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
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