From: utzoo!decvax!cca!KING@KESTREL@sri-unix Newsgroups: net.space Title: Holes in the Radio Sky Article-I.D.: sri-unix.2292 Posted: Tue Jul 27 09:03:58 1982 Received: Thu Jul 29 00:59:22 1982 I doubt that geosynchronous satellites cause any problems for radio astronomers. First, I assume designers of satellite systems would have made the downlink frequencies ones that were quiet for their own sakes. Second, the satellites are low enough so that if one radio astronomy setup is disturbed, another will be able to pick up the signal. Third, radio astronomers' targets are not stationary in the sky. Nor (as I understand it) does their equipment necessarily require long, uninterrupted exposures. It may merely be necessary to snip out (say) seven second segments every four minutes.