Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site bambi.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!columbia!topaz!packard!ihnp1!ihnp4!mhuxn!mhuxr!ulysses!gamma!pyuxww!pyuxa!bambi!mike From: mike@bambi.UUCP (Michael Caplinger) Newsgroups: net.sf-lovers Subject: Re: visible civilization Message-ID: <27@bambi.UUCP> Date: Wed, 7-Aug-85 09:58:55 EDT Article-I.D.: bambi.27 Posted: Wed Aug 7 09:58:55 1985 Date-Received: Sun, 11-Aug-85 04:25:52 EDT References: <3076@topaz.ARPA> <1356@uwmacc.UUCP> <1095@umcp-cs.UUCP> Reply-To: mike@bambi.UUCP (Michael Caplinger) Organization: Bell Communications Research Lines: 12 Actually, the most powerful radio emitters on the planet are early-warning radars, which would look like nearly monochromatic sources along the Earth's limbs. (Since they're pointing roughly horizontally, you couldn't see one near the middle of the disk.) It would be fairly easy to figure out what size antenna would be needed to spatially resolve multiple radars from distance X. I suspect that it would be quite easy to find such objects with planetary- system-baseline VLBI, not to mention the anomolous emission spectrum. - Mike