[eagle] S1 downlink coordination and interference mitigation

Folks,

Coincidentally at the Symposium, Graham Shirville spent some time coordinating proposed frequencies to some satellites, including Eagle, and after a suggestion I had from from Drew KO4MA, I reiterated to Graham that it may be advantageous to propose S1 frequencies right down at the bottom 1MHz of the 2.4GHz satellite allocation.

802.11 specifies a 1MHz guard band at 2400 to 2401MHz for regulatory OOB emission reasons. Signals +/-11MHz from the centre must be at least 30dB down from the carrier. Channel 1 is at 2412MHz.

Taking into account Doppler, the recommended S1 coordinated frequencies will be at the bootom end of 2400MHz without the possibility of OOB emissions on Earth due to Doppler.

73, Howard G6LVB