From: Don Latham (djl_at_montana.com)
Date: Wed Sep 29 2004 - 10:21:55 PDT
Well and good.Don But why would something wishing to communicate make
things difficult?
> william edmondson wrote:
>
>> the radioastronomy service has primary status in the
>> band 1660.0-1670.0 MHz (this for the 2 OH main lines). (Quoted from
>> Gerard)
>
> Not that this "primary status" has afforded us much protection from
> Iridium interference.
>
>> So - we may be looking at the wrong frequencies. We'd have to think
>> about where to look instead, and one "obvious" (??) place would be the
>> 'mid-points' of the H/OH pairings. 1542.9025 and 1543.882 MHz These
>> are nicely near each other, and bang in the middle of the water hole.
>
> And, unfortunately, BADLY polluted by the swarm of navigation
> satellites blanketing the Earth with RFI! But if we ignore that for
> just a moment, I would respectfully suggest that the geometric mean
> makes more sense than the algebraic mean (for reasons I can delve into
> later). Thus, the two mid frequencies should actually be 1538.032 and
> 1538.936 MHz.
> It's also worth considering the geometric mean of the two main hydroxyl
> lines, which comes to 1666.380 MHz.
>
> --
> H. Paul Shuch, Ph.D. Executive Director, The SETI League, Inc.
> 433 Liberty Street, PO Box 555, Little Ferry NJ 07643 USA
> voice (201) 641-1770; fax (201) 641-1771; URL http://www.setileague.org
> email work: n6tx_at_setileague.org; home: drseti_at_cal.berkeley.edu
>
> "We Know We're Not Alone!"
>
>
-- Dr. Don Latham 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 FAX 406-626-5979 www.lightningforensics.com www.sixmilesystems.com
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