Subj : Re: Mars bounce To : alt.ham-radio.vhf-uhf From : Falky foo Date : Sun Oct 16 2005 03:19:45 From Newsgroup: alt.ham-radio.vhf-uhf so could it be done "Jim - NN7K" wrote in message news:qbe4f.16807$6e1.11716@newssvr14.news.prodigy.com... > 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 > > > > > > .