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Old June 19th 09, 01:41 AM posted to sci.geo.satellite-nav
Mike Jr
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Posts: 60
Default Trouble aboard latest Global Positioning System satellite

On Jun 17, 11:47*pm, "Wolfgang S. Rupprecht" wolfgang.rupprecht
wrote:
The Air Force has identified the cause of signal anomalies for PRN01
and will attempt to work around the problem. *If they can do that
PRN01 might be set usable this fall.


http://www.insidegnss.com/node/1573


While I'm really happy that the military provides the GPS for our use,
the announcements they issue read like a bad joke about military
intelligence. *I've read about a dozen reports now that "a signal
anomaly has been detected and they think they can correct it", but the
reports all stop there. *If they really know what is going wrong why
isn't there a proper explanation in that press release?

-wolfgang
--
Wolfgang S. Rupprecht * * * * * * *Android 1.5 (Cupcake) and Fedora-11


What you have is the data. Follow the link to be found here, see page
35.
http://groups.google.com/group/sci.g...6b6bbae20c05f2

Now think. They bolted on an L5 transmitter but it feeds a single
phased array antenna, the same phased array antenna feed by the L1
transmitter. The IIRM birds were not designed with an extra connector
ready made for a new transmitter. I am guessing that the interface to
the phased array antenna had to be changed and changed in a hurry.
Somebody at ITT (I am guessing) made a judgment about swapping in a
new interface that did have a new connector. Clearly that new
interface didn't work as expected.

The wing has limited funds. I am guessing that a decision was made to
not spend the money needed to do near and far field testing. What
kind of technical advice the wing got and what they did with it is
unknown.

You lay down your money and you take your chances.

--Mike Jr
 

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