[time-nuts] Faulty GPS SAT # 16 on Lady Heather

Richard W. Solomon w1ksz at earthlink.net
Thu Jul 29 17:59:06 EDT 2010


Elmer Perkins ??

I know of Perkin Elmer.

73, Dick, W1KSZ


-----Original Message-----
>From: bg at lysator.liu.se
>Sent: Jul 29, 2010 5:41 PM
>To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
>Subject: Re: [time-nuts] Faulty GPS SAT # 16 on Lady Heather
>
>It seems it is beeing moved.
>
>56   16  Launched 29 JAN 2003; usable 18 FEB 2003; operating on Rb std
>           Scheduled unusable 29 Jul 1345 UT to 30 Jul 0145 UT for
>             repositioning maintenance (NANU 2010102)
>
>from   ftp://tycho.usno.navy.mil/pub/gps/gpstd.txt
>
>btw the Elmer Perkins Rb's beats most/all space CS out to a few days.
>Since the ground crew updates clock preditions every day, there is not
>that much need for the Cs _long_ term stability.
>
>--
>
>   Björn
>
>> Once again, one of the 8 received satellites (#16) delivers no
>> contribution to the time ensmble, although it got is over 40dbc
>> strength. Lady Heather (beta 3.00) shows a hollow circle in the diagram,
>> marked yellow in the list, and it has zero CLOCK BIAS and ACCU=0.
>>
>> Does anybody know, if that satellite is defect (e.g. Cs down), or if it
>> has a special task, i.e. military purposes only?
>>
>> Frank
>>
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>
>
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