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June 17th 09, 04:06 AM
posted to sci.astro,rec.radio.amateur.space,rec.radio.amateur.antenna,sci.astro.seti,sci.physics
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Detecting the high def TV for the Google Lunar X Prize.
Jim Lux wrote:
Don't forget that DirecTV radiates a LOT more power than a typical deep space probe. AND they often have a higher gain antenna. A geosync relay satellite might have 96 TWTAs, each several hundred watts, on it, feeding a very clever multiple feed dish which is many meters in diameter (look at Thuraya, for instance). Wow. 96 TWTs with several hundred watts each. From a satellite. And what's the efficiency? So these are powered by what? Small nuclear reactors? Certainly not solar panels. tom K0TAR |
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