When I said the feed would work, I was meaning it would work if LHC. The
illustrations and text imply you could just place a normal GPS receiver at
the feed location, but the polarization would be wrong.
John WA4WDL
--------------------------------------------------
From: "jmfranke" <[email protected]>
Sent: Thursday, October 07, 2010 9:32 PM
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Subject: Re: [time-nuts] GPS backup for the stationary time and
frequencyuser
You are correct. The dish feed should be LHC. The feed would work for
WAAS or other GPS satellites while in the beam pattern, but reject
satellites seen through spill over, etc.
John WA4WDL
--------------------------------------------------
From: "Magnus Danielson" <[email protected]>
Sent: Thursday, October 07, 2010 9:28 PM
To: <[email protected]>
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
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
