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RE: Re: Asteroid echos on 2380 MHz



anybody figure how to enter these elements into Winorbit?

> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of Edward R. Cole
> Sent: Thursday, August 15, 2002 11:21 PM
> To: amsat-bb@AMSAT.Org
> Subject: [amsat-bb] Re: Asteroid echos on 2380 MHz
>
>
> ARRL article:
> http://www.arrl.org/news/stories/2002/08/15/3/?nc=1
>
> Link from the ARRL article:
> http://neo.jpl.nasa.gov/cgi-bin/db?name=2002+NY40+&group=all&search=Search
>
> There is a box listing orbital elements that you can manually enter into a
> tracking program.
>
> The asteroid is purportedly about 1/2 mile in diameter and passing at a
> distance of 300,000 miles (just beyond the orbit of the moon).  So how
> strong an echo will this tiny rock produce compared to a moonbounce signal
> (off a much bigger rock!)?  Of course Arecibo will be running a
> signal 9000
> times as powerful as is used on 2304 MHz eme (avg 100w), and with 40 dB
> more antenna gain!  That's about 80 dB stronger!  the moon is about a
> quarter the size of the earth (guessing 2000 miles diameter) so that is
> (very) roughly (Drock)^2/ (Dmoon)^2 = 1/16,000,000 weaker reflection!
>
> So whatdya say?  Is this possible?
>
> Ed, AL7EB
>
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