Subject: Administrative: GOES-13 (GOES-East) Stray Light Correction This is a multi-part message in MIME format. --Boundary_(ID_+1N2TEPwxaNo9RXd9F4+tg) Content-type: text/plain; charset=windows-1252; format=flowed Content-transfer-encoding: 8BIT * Topic*: GOES-13 (GOES-East) Stray Light Correction Operations Begin Effective 21:00, Tuesday, February 21, 2012. *Date/Time Issued:* February 21, 2012 2045 UTC *Product(s) or Data Impacted:* GOES-13 (GOES-East) Imager in the IR channels, GVAR block 0 *Date/Time of Initial Impact*: February 21, 2012 21:00 UTC.Effected images will begin around 04:00 UTC, 2/22/2012. *Date/Time of Expected End:*February-April and August-October, 3:30-6:30 UTC indefinitely. *Length of Outage:* No outage, *Details/Specifics of Change: * The 24-hour GOES-13 (GOES-East) Stray Light Correction Operations Test conducted on Wednesday, February 15, 2012,was successful. The Stray Light Correction Algorithm will be fully released and become effective for all imaging beginning with 2/22/2012 resulting in no image cancellations for GOES-13 this eclipse season. The images most effective during the first few days will be SHEMI images at 4:09, 4:39, 5:09 and 5:39. GOES-15 (GOES-West) stray light correction is being planned for Fall-2012 Eclipse Season. >>>> 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, “Straylight Correction > Status Word in GVAR Block 0 > ” > 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. >> Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and/or SPSD.UserServices@noaa.gov for comments. Web Site(s) for applicable information: Seeftp://ftp.oso.noaa.gov/Public/Goes/StrayLightCorrection_Documents/for "Poster_Stray_Light_Correction" for additional information. Seehttp://www.osd.noaa.gov/GVAR_Downloads/documents/SLC_GVAR_White_Paper_V1.docfor White Paper for Visible Calibration Coefficients Update (GVAR block 0) Seehttp://www.osd.noaa.gov/GVAR_Downloads/gvar_downloads.htmlfor more GVAR information. Seehttp://www.ssd.noaa.gov/PS/SATS/messages.htmlfor this and other satellite related messages. Seehttp://www.ospo.noaa.gov/Operations/GOES/schedules.htmlfor full GOES scanning schedules and scan sectors. Seehttp://www.ospo.noaa.gov/Operations/GOES/eclipse.htmlfor full eclipse schedules. Seehttp://www.ospo.noaa.gov/Operations/GOES/east/ertn_SP12.htmfor GOES-13 (GOES-East) Routine Imager Schedule in HTML format. Seehttp://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. --Boundary_(ID_+1N2TEPwxaNo9RXd9F4+tg) Content-type: text/html; charset=windows-1252 Content-transfer-encoding: 8BIT
Topic
: GOES-13 (GOES-East) Stray Light Correction Operations Begin Effective 21:00, Tuesday, February 21, 2012.

Date/Time Issued: February 21, 2012  2045 UTC

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

Date/Time of Initial Impact: February 21, 2012 21:00 UTC.Effected images will begin around 04:00 UTC, 2/22/2012.

Date/Time of Expected End:February-April and August-October, 3:30-6:30 UTC indefinitely.

Length of Outage: No outage,

Details/Specifics of Change:

The 24-hour GOES-13 (GOES-East) Stray Light Correction Operations Test conducted on  Wednesday, February 15, 2012,was successful. The Stray Light Correction Algorithm will be fully released and become effective for all imaging beginning with 2/22/2012 resulting in no image cancellations for GOES-13 this eclipse season. The images most effective during the first few days will be SHEMI images at 4:09, 4:39, 5:09 and 5:39.
GOES-15 (GOES-West) stray light correction is being planned for Fall-2012 Eclipse Season.
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, “Straylight Correction Status Word in GVAR Block 0” 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.



Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and/or 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.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 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.htmlfor 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.pdf GOES-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.

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