Subj : Re: Mars bounce To : alt.ham-radio.vhf-uhf From : Jim - NN7K Date : Sat Oct 15 2005 22:06:30 From Newsgroup: alt.ham-radio.vhf-uhf About the ONLY antenna that could attain THAT- "Mars-Bounce" would be Aricebo, Peurto Rico-- A ham, named Sam Harris, W1FZJ (and the first to describe a Parametric Amplifier) got access to it once for moonbounce-- the signal off the moon was so great that at least one ham heard him with a 1/4 wave whip , on 432 (6-1/4 inches) into his converter! But, THIS antenna isn't going to fit your back yard!! It is over a thousand feet in diameter, sus- pended between hillsides! and you move the FEED, not the DISH (other than by the rotation of the earth). Also, you must consider Faraday Rotation (the effect that horizontal polarization , when bounced off a spherical object will come back at a different polarization than it was recieved , causing additional loss) Translation: Dont hold your breath! Jim NN7K Dale Parfitt wrote: > "Falky foo" wrote in message > news:us04f.3847$7h7.3571@newssvr21.news.prodigy.com... > >>Anybody achieved this yet? I mean,.. what would it take? >> > > - Go the ARRL Handbook or the UHF/Microwave manul and do the math- it's a > good exercise. You can assume martian reflectivity is the same as lunar > reflectivity = 0.065 > > Dale W4OP > > > .