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NRT Notification Detail
| A short period of data GRAS level 1 data degradation
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DATE: 2012-02-15 11:46
TYPE: NRT-GTS
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| Description
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| Dear GRA SAF GTS User
Issued: 2012-02-15 11:45 UTC
There was a short degradation of upstream GRAS level 1 b data this morning. The GRAS SAF products were flagged accordingly.
Please see detailed message from EUMETSAT below.
Kind regards
The GRAS SAF Team
Forwarded message:
Subject: A short period of data GRAS level 1 data degradation
From: Christian Marquardt
Date: 2012-02-15 10:31 UTC
Dear all,
the network maintenance activities performed at ESOC this morning have indeed caused a short degradation (but no outage) of GSN products, resulting in degraded POD performance for a period between (roughly) 09:00 and 09:30 UTC sensing times today, 15. February 2012. Level 1 bending angles are characterized by increased biases and standard deviations (both in the order of 10-15 microradians) at high altitudes during this period. We expect that you'll observe increased rejection rates for GRAS data in your QC systems during this period.
The event did not trigger a reset of the Precise Orbit Determination, and data quality now appears to be back to normal (we are still watching our quality monitoring). Therefore, the data is *not* flagged as degraded.
We will inform you if further degradations of GRAS data quality occur; if you won't get further emails from me, bending angle data quality will have remained to be within the nominal requirements.
With kind regards,
Chris.
--
Dr. Christian Marquardt, Polar System Product Expert
EUMETSAT, Eumetsatallee 1, D-64295 Darmstadt, Germany
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