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NRT Notification Detail

Degraded GRAS level 1b data, POD reset

DATE: 2010-07-27 13:35
TYPE: NRT-GTS

Description

Dear GRAS SAF GTS user Issued 2010-07-27 13:35 UTC Upstream GRAS level 1 b data was degraded today between 08:24 and 10:12 UTC. GRAS SAF level 2 products were flagged accordingly. Please see detailed message from Eumetsat below. Kind regards The GRAS SAF Team Forwarded message: Subject: GRAS POD reset today, 27/07/2010 From: Christian Marquardt Date: 2010-07-27 12:25 Dear all, unfortunately, another reset in the GRAS processing occurred today, 27 July 2010, for measurements taken around 08:24 UTC. The reset was caused by maintenance work in the operational ground segment which accidentally caused one GPS clock file not being delivered to the GRAS processor. We have manged to re-initialize the Metop orbit in the operational processing chain with an already converged orbit from another ground segment. As a consequence, GRAS data between 08:24 and 10:12 UTC has been flagged as containing bad bending angle data. All data after 10:12 UTC should be fine again. In case you're interested, the time series of upper level (60-80km) mean bending angle values for the last two days can be found at http://twitpic.com/294qd6 (the reset corresponds to to the increased value on the on the right); the figure still highlights the weekend's reset on the left. With our apologies, Christian. -- Dr. Christian Marquardt, Polar System Product Expert EUMETSAT, Am Kavalleriesand 31, D-64295 Darmstadt, Germany

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