Brooke:
Good idea but my balcony faces north.
Ronald
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From: <[EMAIL PROTECTED]>
Date: Dec 17, 2007 8:05 PM
Subject: time-nuts Digest, Vol 41, Issue 63
To: time-nuts@febo.com
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Today's Topics:
1. Re: Discussion of precise time and frequency measurement
(Brooke Clarke)
2. Re: HP5359A non-linearities ([EMAIL PROTECTED])
3. Re: HP5359A non-linearities (Poul-Henning Kamp)
4. Re: HP5359A non-linearities (Magnus Danielson)
5. Re: HP5359A non-linearities (Magnus Danielson)
6. Discussion of precise time and frequency measurements
(Ronald Held)
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Message: 1
Date: Mon, 17 Dec 2007 16:09:31 -0800
From: Brooke Clarke <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Discussion of precise time and frequency
measurement
To: Discussion of precise time and frequency measurement
<time-nuts@febo.com>
Message-ID: <[EMAIL PROTECTED]>
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Hi Ronald:
Some people interested in the WAAS aspect of GPS have used the common Ku band
satellite TV dishes as reflectors and mounted a GPS antenna at the focus (where
the Ku band antenna would normally be located.
The claim is that it works well even though the polarity of the reflected GPS
signal is backwards. You probably can get one of these antennas and it's mount
for free since there's millions of them all over the world. The neat thing is
that you can have it sitting back on the balcony pointing at the clear opening
(remember it's an offset feed so the dish needs to point much lower than where
the dish faces.)
You would only have a partial sky view but if your balcony faces any direction
except North, they you should get a lock some of the time. Note there are no
GPS sats within 30 degrees of the North or South pole so a GPS antenna pointed
up to the North in the northern hemisphere will not see too many sats.
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam
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