The moon is roughly 360,000 to 400,000 km away. By comparison, AO-40 had a apogee of about 60,000km. At 2.4Ghz, that's about 16db difference each way. Put AO-40 at the moon, and if I'm doing this right, you'd need about 32 times the ground station antenna both coming and going to get with a few db. I'm gonna need a bigger rotor for sure! I'm sure smarter folks will check my math....
73, Drew KO4MA
----- Original Message ----- From: "Joe" nss@mwt.net To: "Andrew Glasbrenner" glasbrenner@mindspring.com Cc: "Trevor" m5aka@yahoo.co.uk; "AMSAT BB" amsat-bb@amsat.org Sent: Wednesday, July 02, 2008 6:05 PM Subject: Re: [amsat-bb] Re: NASA's American Student Moon Orbiter...
what would a sample average link budget be?
Andrew Glasbrenner wrote:
As far as I can recall we are pursuing both Eagle and the P4 opportunity equally, concentrating on common elements until the details are ironed out. Neither has been identified as a primary or secondary objective.
I agree a package on a lunar orbiter would be neat, but also that it is not the best use of what volunteers we have. We need more folks to step up to do things, AND we need to make better use of them when they do.
73, Drew KO4MA
----- Original Message ----- From: "Trevor" m5aka@yahoo.co.uk To: "AMSAT BB" amsat-bb@amsat.org Sent: Wednesday, July 02, 2008 4:53 PM Subject: [amsat-bb] Re: NASA's American Student Moon Orbiter...
--- On Wed, 2/7/08, Dave hartzell hartzell@gmail.com wrote:
http://www.spaceref.com/news/viewpr.html?pid=25839 http://asmo.arc.nasa.gov/
Wouldn't it be fun to have a transponder on this! ;-)
Fun yes, but dare I say it, a waste of precious Volunteer resources.
All lunar orbits are inherently unstable and will impact after a couple of years. The link budget requirements would not attract a mass user base.
I suspect the number of Technically Capable volunteers is already being thinly stretched in trying to provide both the primary objective Phase-IV Lite (funded by Federal Government dollars) and the secondary objective the Eagle HEO.
73 Trevor M5AKA
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