[amsat-bb] Re: NASA's American Student Moon Orbiter...

[Andrew Glasbrenner]

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 at mwt.net>
To: "Andrew Glasbrenner" <glasbrenner at mindspring.com>
Cc: "Trevor" <m5aka at yahoo.co.uk>; "AMSAT BB" <amsat-bb at 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 at yahoo.co.uk>
>>To: "AMSAT BB" <amsat-bb at 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 at 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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>>
>>
>>