A radar that can pick up anything at 100,000 miles is pretty damn good. Radar detection falls off at an inverse quad with distance, not just an inverse square, like regular radio. (The outgoing signal strength drops at an inverse square, and then the return echo also drops off at an inverse square coming back.) Unless you've got something else going for you, to tell you exactly where to aim a very powerful radar beam, you aren't going to see anything at that range.
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Date: 2010-01-03 04:15 am (UTC)