Found the following interesting site: http://www.df9cy.de/pathloss.htm
There is a downloadable spread sheet concerning moon-bounce path loss. I
have not verified the accuracy of the spread sheet, but it looks reasonable:

From the spread sheet, if you plug in the following parameters:

Power 1 kW;
BW 3 MHz;
Antenna gain 35 dB;
Frequency 2.4 GHz
and many more, such as noise figure, etc.

The received signal will be 40 dB below the noise.

Reducing the bandwidth to 100 Hz the signal will be about 4 dB above the
noise
-- as 10*log(BW1/BW2) will confirm.

Reduction in bandwidth to between 1 and 10 Hz would seem to be desirable.
Stability required is about 0.0004 ppm, not to mention degradation due to
TCXO 1/f noise.


Frank