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-------- Original Message --------Update: *Another issue has begun to impact the sounding products. The GOES-12 Sounder noise is still a problem but now we also have a Sounding filter wheel problem that is affecting all channels. The GOES-12 Sounder Filter Wheel has been having a product impact since 20:00 UTC last night (DOY: 350, 12/16/09). Overnight, the FW returned to normal for a while and later the problem became more severe during 01:00-04:00 and 08:00-10:00 UTC with the worst product impact during 03:00 and 08:00. Products seem to be severely affected only about 2-3 hours per day during the last 24 hours. This degradation that is being observed is mainly due to dropouts in the images or dead pixels, about 15% of the pixels are dead. The products that we are sending out have not been affected other than less retrievals due to the dead pixels, but the retrievals that are being produced are good, we are not seeing an affect in the quality of our products other than the images having the dropouts appearing intermittently throughout the day.*
Topic: *GOES-12 (East) Sounder Filter Wheel* Date/Time Issued: *December 17, 2009**, 2313 UTC*Product(s) or Data Impacted: * GOES-12 (East) Sounder Products - 5x5 and 1x1 soundings, radiance and cloud products, sounder DPI (Derived Product Imagery - including Lifted Index, Total Precipitable Water, Cloud Top Temperature, Skin Temperature), ASOS Sounder SCP (Satellite Cloud Products)*
Date/Time of Initial Impact:* December 16, 2009** * Date/Time of Expected End: *Episodic - Until Further Notice* Length of Event: *TBD (To Be Determined)* * *Impacts on Users and Significance: *Users may see dropouts (dead pixels) within GOES-12 sounder derived products, especially visually evident within the Sounder DPI imagery on AWIPS.
*User Actions: *Use GOES-12 (East) sounder products with caution.*Details/Specifics of Change: *The problem is episodic and is being investigated by NESDIS enginee*rs.
Contact Information for Further Information: *ESPC Operations Crew Leader at ESPCOperations@xxxxxxxx <mailto:ESPCOperations@xxxxxxxx> and 301-817-3880*
Web Site(s) for applicable information:*The product impact can be assessed qualitatively at the CIMSS web site. Below are links to the for two worst hours of impact:*
http://cimss.ssec.wisc.edu/goes/rt/viewdata.php?product=ge_all&time=09351.0300&imageType=image <http://cimss.ssec.wisc.edu/goes/rt/viewdata.php?product=ge_all&time=09351.0300&imageType=image>
http://cimss.ssec.wisc.edu/goes/rt/viewdata.php?product=ge_all&time=09351.0800&imageType=image <http://cimss.ssec.wisc.edu/goes/rt/viewdata.php?product=ge_all&time=09351.0800&imageType=image>*
**Special BLOG has been setup at CIMSS to see both the sounding images with the AWIPS SDPI imagery
*http://cimss.ssec.wisc.edu/goes/blog/archives/4133
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