Subject: Administrative: GOES-13 (GOES-East) Stray Light Correction --002354470bfc6fa05204b8f13479 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Topic: GOES-13 (GOES-East) Stray Light Correction Operations Test is scheduled for February 15, 2012 at 1535 UTC Date/Time Issued: February 14, 2012 1900 UTC Product(s) or Data Impacted: GOES-13 (GOES-East) Imager in the IR channels, GVAR block 0 Date/Time of Initial Impact: February 15, 2012 15:35 UTC Date/Time of Expected End: February 16, 2012 15:35 UTC Length of Outage: No outage, 24-hour test. Details/Specifics of Change: There will be a 24-hour GOES-13 (GOES-East) Stray Light Correction Operations Test scheduled for tomorrow, Wednesday, February 15, 2012, at 1535 UTC for users to verify that they are able to read the new GVAR bit in Block 0, ingest corrected images, and address any issues they may have. There is no backup date for this test. PLEASE NOTE: During this 24-hour test, SHEMI images (4:39, 5:09 and 5:39) will be positively effected by the new correction algorithm. User feedback = on the results of the corrected data at these three particular time periods is highly encouraged. Background: In the past stray light from the sun has affected the GOES Imagery. A new software version has been created to minimize the effects of the stray light. This Eclipse Season the GOES ground system is including a new algorithm to correct for contamination for stray light from sun when it is within 20 degrees. Solar contamination saturates the images and renders them useless when it is within 6 degrees of a frame. With this new algorithm NOAA will be able to provide images without any interruption hence a better monitoring of the earth-ocean-atmosphere system. The algorithm will work in real-time and within the Sensor Processing System (SPS) resulting in corrected GVAR stream to the users. The stray light correction and minimum sun angle for each line will be included in the GVAR stream in Block-0 so the users can opt not to use any line or frame when too close to the sun. This version of ground software also updates GVAR block 0 with the stray light status including the minimum sun angle to each line and the location of the sun relative to the scan line. The detailed changes are documented in the white paper, =93Straylight Correction Status Word in GVAR Block 0=94 which can be downloaded from the GVAR Download page referenced below. Please check out the new information included in Block-0 which can be utilized to reject any corrected lines too close to sun if products are affected adversely. In addition, if the 24-hour operations test completes with no complications, NOAA will coordinate the full release of stray light correction software to operations this eclipse season, beginning Tuesday, February 21, 2012, for GOES-13 (GOES-East) resulting in uninterrupted imaging. It will be followed by GOES-15 (GOES-West) stray light correction operations during Fall-2012 Eclipse Season. Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and SPSD.UserServices@noaa.gov for comments. Web Site(s) for applicable information: See ftp://ftp.oso.noaa.gov/Public/Goes/StrayLightCorrection_Documents/ for "Poster_Stray_Light_Correction" for additional information. See http://www.osd.noaa.gov/GVAR_Downloads/documents/SLC_GVAR_White_Paper_V1.do= cfor White Paper for Visible Calibration Coefficients Update (GVAR block 0) See http://www.osd.noaa.gov/GVAR_Downloads/gvar_downloads.html for more GVAR information. See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other satellite related messages. See http://www.ospo.noaa.gov/Operations/GOES/schedules.html for full GOES scanning schedules and scan sectors. See http://www.ospo.noaa.gov/Operations/GOES/eclipse.html for full eclipse schedules. See http://www.ospo.noaa.gov/Operations/GOES/east/ertn_SP12.htm for GOES-13 (GOES-East) Routine Imager Schedule in HTML format. See http://www.ospo.noaa.gov/Operations/GOES/documents/ertn_SP12.pdfGOES-13 (GOES-East) Routine Imager Schedule in PDF format. See http://www.ospo.noaa.gov/Operations/GOES/documents/east_SP12.xls and http://www.ospo.noaa.gov/Operations/GOES/documents/east_SP12.xlsx for both GOES-East Imager and Sounder Schedules. This message was sent to ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request. --002354470bfc6fa05204b8f13479 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Topic: GOES-13 (GOES-East) Stray Light Correction Operations Test is = scheduled for February 15, 2012 at 1535 UTC

Date/Time Issued: February 14, 2012 1900 UTC

Product(s) or Data Impacted: GOES-13 (GOES-East) Imager in the IR channels,= GVAR block 0

Date/Time of Initial Impact: February 15, 2012 15:35 UTC

Date/Time of Expected End: February 16, 2012 15:35 UTC

Length of Outage: No outage, 24-hour test.

Details/Specifics of Change:
There will be a 24-hour GOES-13 (GOES-East) Stray Light Correction=20 Operations Test scheduled for tomorrow, Wednesday, February 15, 2012, at 1535 UTC for users to verify that they are able to read the new GVAR=20 bit in Block 0, ingest corrected images, and address any issues they may have. There is no backup date for this test.

PLEASE NOTE: During this 24-hour test, SHEMI images (4:39, 5:09 and=20 5:39) will be positively effected by the new correction algorithm. User=20 feedback=A0on the results of the corrected data a= t these three particular=20 time periods is highly encouraged.

Background:
In the past stray light from the sun has affected the GOES Imagery. A=20 new software version has been created to minimize the effects of the=20 stray light. This Eclipse Season the GOES ground system is including a=20 new algorithm to correct for contamination for stray light from sun when it is within 20 degrees. Solar contamination saturates the images and=20 renders them useless when it is within 6 degrees of a frame. With this=20 new algorithm NOAA will be able to provide images without any=20 interruption hence a better monitoring of the earth-ocean-atmosphere=20 system. The algorithm will work in real-time and within the Sensor=20 Processing System (SPS) resulting in corrected GVAR stream to the users. The stray light correction and minimum sun angle for each line will be=20 included in the GVAR stream in Block-0 so the users can opt not to use=20 any line or frame when too close to the sun.

This version of ground software also updates GVAR block 0 with the stray light status including the minimum sun angle to each line and the=20 location of the sun relative to the scan line. The detailed changes are=20 documented in the white paper, =93Straylight Correction Statu= s Word in GVAR Block 0=94 which can be downloaded from the GVAR Downloa= d page=20 referenced below. Please check out the new information included in=20 Block-0 which can be utilized to reject any corrected lines too close to sun if products are affected adversely.

In addition, if the 24-hour operations test completes with no=20 complications, NOAA will coordinate the full release of stray light=20 correction software to operations this eclipse season, beginning=20 Tuesday, February 21, 2012, for GOES-13 (GOES-East) resulting in=20 uninterrupted imaging. It will be followed by GOES-15 (GOES-West) stray=20 light correction operations during Fall-2012 Eclipse Season.

Contact Information for Further Information: ESPC Operations at=20 ESPCOperations@noaa.gov at 3= 01-817-3880 and SPSD.UserServ= ices@noaa.gov=20 for comments.

Web Site(s) for applicable information:
See ftp://ftp.oso.noaa.gov/Public/Goes/StrayLightCorrection_Documents/<= /a>=20 for "Poster_Stray_Light_Correction" for additional information. See=20 http://www.osd.noaa.gov/GVAR_Downloads/documents/SLC_GVAR_Whi= te_Paper_V1.doc for White Paper for Visible Calibration Coefficients Update (GVAR block 0)
See = http://www.osd.noaa.gov/GVAR_Downloads/gvar_downloads.html for more GVA= R information.
See http://www.ss= d.noaa.gov/PS/SATS/messages.html for this and other satellite related m= essages.
See htt= p://www.ospo.noaa.gov/Operations/GOES/schedules.html for full GOES scan= ning schedules and scan sectors.
See http:= //www.ospo.noaa.gov/Operations/GOES/eclipse.html for full=20 eclipse schedules.
See http://www.ospo.noaa.gov/Operations/GOES/east/ertn_S= P12.htm for GOES-13 (GOES-East) Routine Imager Schedule in HTML format.=
See http://www.ospo.noaa.gov/Operations/G= OES/documents/ertn_SP12.pdf GOES-13 (GOES-East) Routine Imager Schedule= in PDF format.
See http://www.ospo.noaa.gov/Opera= tions/GOES/documents/east_SP12.xls and http://www.ospo.noaa.gov/Operations/GOES/documents/east_SP12.xlsx fo= r both GOES-East Imager and Sounder Schedules.

This message was sent to ESPC= .Notification@noaa.gov. You have been sent=20 this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk=20 at ESPCOperations@noaa.gov o= r (301) 817-3880. Please note: it may take=20 up to two business days to process your unsubscribe request.
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