[time-nuts] GPS backup for the stationary time and frequency user

[jmfranke]

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" <magnus at rubidium.dyndns.org>
Sent: Thursday, October 07, 2010 9:28 PM
To: <time-nuts at 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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