In another paper, at the FEI web site, the author emphasizes that he did not
change the polarization, but did see a 12 dB gain with the dish. There is
even a nice image with a typical timing GPS antenna mounted at the feed
slide 27 in
http://www.frequencyelectronics.com/gps_gnss/waas_for_telecom_2-07.pdf .
John WA4WDL
--------------------------------------------------
From: "Magnus Danielson" <mag...@rubidium.dyndns.org>
Sent: Thursday, October 07, 2010 9:28 PM
To: <time-nuts@febo.com>
Subject: Re: [time-nuts] GPS backup for the stationary time and frequency
user
On 10/08/2010 03:02 AM, Robert Harmon wrote:
Saw this interesting article several years ago about using an 18 inch
dish
pointed at a WAAS satellite:
http://www.freqelec.com/gps_gnss/waas_for_telecom_wp_5-06.pdf
Notice footnote 12 (on page 9).
Will not a standard GPS antenna have the wrong circular polarisation when
looking into the mirror image of the offset antenna?
I would expect the thing to work due to antenna gain and leakage in the
wrong antenna mode. Ah well...
Cheers,
Magnus
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