at 301-817- 3880 Web Site(s) for applicable information: See http://www.ospo.noaa.gov/Operations/GOES/documents.html for more specific information and related documents. See http://cimss.ssec.wisc.edu/goes/blog/archives/10341 for more details on the Imager co- registration. See http://cimss.ssec.wisc.edu/goes/blog/archives/15184 for more details on the Sounder dropped pixel recovery. --------------020209020202050708040509 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit

Topic: GOES-13 SPS (Sensor Processing System) Software Version 10.4.1 Release, 4/22/2014

Date/Time Issued: April 17, 2014 1825 UTC

Product(s) or Data Impacted: GOES-13 (GOES-East) Imager and Sounder data

Date/Time of Initial Impact: April 22, 2014 1535 UTC

Date/Time of Expected End: Permanent change

Length of Outage: Permanent change

Details/Specifics of Change: On April 22, 2014, a new Sensor Processing System (SPS) software version

(10.4.1) will be released for GOES-13 (GOES-East). The new SPS release 10.4.1 replaces version 10.2 and

corrects the following issues observed with GOES-13 imager and sounder.

1. GOES-13 (GOES-East) IR Channels 2 (3.9 um) and 4 (10.7 um) registration difference was discovered

to be 1 pixel or greater at certain times of day. This can cause false fog data which uses the difference

between these two channels. A registration correction algorithm was developed into SPS v10.4.1 which

shifts one of these channels towards the other based on whichever is closer to visible channel. When

channel-2 needs correction (GOES-13) it is shifted one full pixel whenever the difference is more than

0.5 pixel. When channel-4 needs correction (GOES-14), the data are re-sampled to make a full correction

so the two channels’ registration better match.

2. GOES-13 (GOES-East) Sounder Dropped Pixel Correction

The last significant element to be included in this software release is the implementation of an algorithm

which utilizes a second sync-bit code if the first is not found. This algorithm will allow the software to

recover what was previously considered as lost data blocks which are depicted as missing pixels (black

spots) since July 2013.

Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-

3880

Web Site(s) for applicable information:

See http://www.ospo.noaa.gov/Operations/GOES/documents.html for more specific information and