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@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@amsat.org] On Behalf Of Joe Sent: Saturday, November 07, 2015 1:58 PM To: amsat-bb@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@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