[amsat-bb] Re: [Fwd: Re: Re: The Moon is our Future]

[Joe]

What someone really needs to do is to run a real actual link budget, and 
see what things really like are.

Joe

n0jy at lavabit.com wrote:

>Somehow I sent this in reply to Bob instead of the group.  Sorry, Bob.
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>>BUT one easy way to get gain is to use just a long coaxial gain
>>cable.  I think it takes about 22 feet of coaxial dipole
>>elements at 2 meters to give about 6 dB of gain.  So laying down 6 dB
>>    
>>
>gain segments on the rock of the moon is as easy as
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>>unrolling a spool of cable.  Unrolling 8 of these with the right spacing
>>    
>>
>could yield about 17 dB.
>  
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>>Of course this woiuld only point straight up, so it would need
>>to be on a moon base in the middle of the earth facing side.
>>But since there is a lot of interest in moon bases near the
>>poles where there might be water, then a similar array of layed
>>down coaxial cable arrays could be phased horizontally to point
>>at earth.  Actually, just about any direction can  be obtained
>>with the right spacing.
>>
>>ONLY problem of course is there has to be someone with legs to
>>roll out the cables.
>>    
>>
>
>How about, if the location is very near the pole, an array that extends up
>like a push-pole vertically from the craft, with tape measure type dipoles
>that spring out horizontally when the pole goes up?  You might need a
>small rotator on the base of the pole then to make sure the dipoles point
>at Earth depending on the orientation of the craft when it lands, but that
>would only need to be turned once I believe, when it is deployed.
>
>Jerry
>N0JY
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