[IGSSTATION-511]: OPMT: RINEX file corrupted for DOY 167.

[Pierre Uhrich]

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IGS Station Mail          17 Jun 06:00:15 PDT 2005      Message Number 511
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Author: Pierre Uhrich (Observatoire de Paris)

Dear Colleagues,

Observatoire de Paris (France) sufferred an electrical power failure 
shortly after 00:00 UTC on DOY 167 (MJD 53537, June 16). One of the 
unexpected consequences was the failure of both H-Masers of the 
laboratory, hence the one connected to our IGS station OPMT. This 
resulted in a loss of frequency reference for the Ashtech Z12-T receiver 
during a few hours. Moreover, the H-Maser restart in the morning of DOY 
167 means a period of time which can reach a few days before the 
frequency of the H-Maser stabilizes again.

For many different reasons, it was decided not to change the H-Maser 
source of the OPMT receiver yet. We will await the choice made by our 
Colleagues in charge of the Primary Frequency Standards among the 
H-Masers currently available to plan a change if necessary.

This message is intended to warn potential users that the RINEX file for 
DOY 167, which was computed automatically and released this morning 
(June 17), is corrupted.

Please feel free to forward this message to any Colleague you might feel 
interested.
Best regards.
P. Uhrich.
-- 
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Dr Pierre Uhrich			Pierre.Uhrich at obspm.fr
Ingenieur LNE
Equipe Metrologie du temps
LNE-OP/SYRTE,			Phone:	+ 33 (0)1 40 51 22 17
UMR CNRS 8630,			Fax:	+ 33 (0)1 43 25 55 42
Observatoire de Paris,
61 avenue de l'Observatoire, F-75014 Paris, France.
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