[amsat-bb] Link Budget

[Bob- W7LRD]

Why not L/S on a geo bird? I may have missed the memo on that idea. Many of us still have AO40 (sobsob) gear. 
73 Bob W7LRD 

----- Original Message -----

From: "Paul Stoetzer" <n8hm at arrl.net> 
To: "KA9QJG" <KA9QJG at comcast.net> 
Cc: "Joe" <nss at mwt.net>, "amsat-bb at amsat.org" <AMSAT-BB at amsat.org> 
Sent: Saturday, November 7, 2015 1:22:13 PM 
Subject: Re: [amsat-bb] Link Budget 

The good thing is that high power at 5 GHz is expensive, so I doubt 
anyone will be running too much more than they have to on P4B! 

73, 

Paul, N8HM 

On Sat, Nov 7, 2015 at 4:10 PM, KA9QJG <KA9QJG at comcast.net> wrote: 
> Joe And Others for many years I have Heard thoughts about a Geo synchronous 
> well mostly it was the cost, But I also heard a lot of people say if We 
> had a Geo type bird We would have the people who like to setting us Big ants 
> lots of power and just set and be on the birds all the time . 
> Unfortunately I know We do have this type on the air I haves no idea if this 
> would actually happen or not 
> 
> 73 De Don KA9QJG 
> 
> -----Original Message----- 
> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Joe 
> Sent: Saturday, November 07, 2015 1:58 PM 
> To: amsat-bb at amsat.org 
> Subject: [amsat-bb] Link Budget 
> 
> Can anyone here run a link budget for me? 
> 
> I'm in an slight heated debate with some people, About how they have heard 
> about the possible Geo synchronous bird coming up, and they are all 
> wondering why don't "THEY" I like the "THEY" part, anyway why don't they 
> just put it on the moon. 
> 
> I gave them several reasons why a Geo bird is better, 
> 
> 1- It is there 24/7 where the moon is visible less than 50% of the day 
> 
> 2- the Geo bird doesn't move ( or extremely little) so set the antenna and 
> forget it. Where the moon requires tracking programs and antennas that can 
> move in AZ and EL 
> 
> 3- Useable "Window" The amount of the earths surface that can see either is 
> soo close to the same why bother I bet a geo bird would be at least close to 
> 90% of what the moon see's 
> 
> 4- And finally antennas and power required. The moon being soooo much 
> farther away the amount of power needed each way has to be MUCH more. 
> And thats what I was wondering say you had a nice decent transponder in Geo 
> orbit. what power levels say ERP I guess is needed each way? then drop the 
> same transponder and how much more erp each way will be needed to have the 
> same level of contact quality? 
> 
> Joe WB9SBD 
> 
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_______________________________________________ 
Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available 
to all interested persons worldwide without requiring membership. Opinions expressed 
are solely those of the author, and do not reflect the official views of AMSAT-NA. 
Not an AMSAT-NA member? Join now to support the amateur satellite program! 
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb