ROM SAF - NRT Notification Detail

NRT Notification Detail

Outage of GRAS level 1b data

DATE: 2010-11-22 11:28
TYPE: NRT-GTS

Description

Dear GRAS SAF GTS User Issued 2010-11-22 11:26 UTC Due to an outage of upstream GRAS level 1 b data no GRAS SAF level 2 products are currently disseminated. The dissemination stopped at instrument sensing time 2010-11-22 07:21:34 UTC. Furthermore GRAS level 1 b data has been degraded since 2010-11-20 08:57 UTC and as a consequence the GRAS SAF level 2 refractivity product has also been degraded. Please see detailed message from EUMETSAT below. Note that since the below message, the error has possibly been located to be connected with the upstream GPS clock estimations from GSN. In that case the GRAS level 1b and GRAS SAF products should be back to nominal quality later today. Kind regards The GRAS SAF Team Forwarded Message: Subject: GRAS data degradation ongoing since 20 Nov 2010 08:57 UTC From: Christian Marquardt Date: 2010-11-22 09:13 UTC Dear all, unfortunately, I have to report on an ongoing significant degradation of GRAS level 1 data quality starting on 20. Nov 2010 (that's Saturday) 08:57 UTC measurement time. The problem is still ongoing. While the first eight hours of data (until about 17:00 UTC on 20/11/2010) were correctly flagged as degraded, data after that point in time continued to be of poor quality, but did not indicate this usuing the corresponding data quality flags. In order to not continue to deliver bad data to you, we have taken the decision to stop the dissemination of GARS level 1 data for the time being. We are currently investigating the cause for the issue and will keep you informed. We will also resume with the data dissemination as soon as the data quality is nominal again. We apologize for the inconvenience this causes! With kind regards, Christian. -- Dr. Christian Marquardt, Polar System Product Expert EUMETSAT, Am Kavalleriesand 31, D-64295 Darmstadt, Germany

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