Hi David, G0MRF

During the Arecibo EME test on day 16 April from 16:45 to 19:30 UTC the sunset for me in JN70ES will be at 18:01 UTC so that no noise will be received from the sun when it is belove the horizon and the moon at 20° Elevation

On day 17 April during EME test from 17:40 to 20:20 UTC the sunset will be similarly at 18:06 UTC

On day 18 April during EME test from 18:40 to 21:25 the sunset will happen before the beginning of the test and at 18:40 UTC the sun's elevation will be already negative -10° with the moon for us at 36° elevation

In Europe the situation is similar and we should have no problems receiving and trying QSO's with Arecibo using antennas and receivers for satellite traffic as on FO-29 and HO-68

The problem is that in Europe there are many powerful 432 MHz EME stations and everybody will be hungry to make QSO with KP4AO

In USA the situation is completely different because the elevation of the sun and the moon is about the same around 60° but the azimut is shifted several degrees so that using antennas with gain of 15 dBi or more the sun noise should be rejected.

Good luck with Arecibo to everybody

73" de

i8CVS Domenico

----- Original Message ----- From: G0MRF@aol.com To: amsat-bb@amsat.org Sent: Sunday, April 11, 2010 9:53 AM Subject: [amsat-bb] Re: Arecibo on 432 MHz Moon Bounce (some calculations)

A quick look at the access from Europe shows that the moon is in a similar location to the sun next weekend. So higher gain antennas on 70cm will

help

reduce sun noise too.

Good luck Dom, thanks for the analysis.

73

David G0MRF

The above calculation shows that it is very difficult to hear KP4AO or be heard using a small hand-held yagi pointed at the moon.

Have fun

73" de

i8CVS Domenico

---

Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb