[IGSSTATION-2457]: OPMT: Unexpected cut of electrical power in Observatoire de Paris

[Pierre Uhrich]

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IGS Station Mail          28 Aug 11:03:48 PDT 2008      Message Number 2457
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Author: Pierre Uhrich (LNE-SYRTE, Observatoire de Paris)

Dear Colleagues,

There was today a severe unexpected cut of electrical power in 
Observatoire de Paris (OP), which affected among other equipment both 
OPMT station equipment and external clock.

Electric civil work was planned to take place today in some parts of OP 
campus. But this was not supposed to affect in any ways LNE-SYRTE Time 
Metrology equipment, which includes the OPMT IGS station. Unexpectedly, 
the whole campus was powered off without warning at 10:22 UTC today 
August 28.

As a result, OPMT equipment, the external H-Maser clock, and data 
transfer were all off for about half an hour. Since the restart, we are 
trying to analyze the damages on all our equipment, and especially 
either on the GPS receiver or on the H-Maser used as external clock for 
the OPMT station. But the situation remains unclear at the time of the 
writing of this message.

Therefore, there will be not only missing data but also most probably 
corrupted data in the OPMT files collected today. We advise people using 
OPMT data to avoid doing so starting today until further notice.

An update will be sent as soon as possible.
Best regards.
P. Uhrich

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Dr Pierre Uhrich			Pierre.Uhrich at obspm.fr
Inginieur-chercheur LNE
Equipe Mitrologie du temps
LNE-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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