Subject: Administrative: GOES-13 (GOES-East) Stray Light Correction --00235452ffec2fa22f04b8770b60 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 9, 2012 at 1535 UTC Date/Time Issued: February 8, 2012 1715 UTC Product(s) or Data Impacted: GOES-13 (GOES-East) Imager in the IR channels, GVAR block 0 Date/Time of Initial Impact: February 9, 2012 15:35 UTC Date/Time of Expected End: February 10, 2012 15:35 UTC Length of Outage: No outage, 24-hour test. Details/Specifics of Change: This Eclipse Season 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. There will be a 24-hour GOES-13 (GOES-East) Stray Light Correction Operations Test scheduled for tomorrow, Thursday, February 9, 2012 at 1535 UTC for users to ingest corrected images and address any issues they may have. For the coming eclipse seasons, beginning on February 15, 2012, the stray light correction will be performed continuously for GOES-13 (GOES-East) avoiding any image cancellations. It will be followed by GOES-15 (GOES-West) during Fall-2012 Eclipse Season. 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 also 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. PLEASE NOTE: During this 24-hour test, SHEMI images within 60 minutes of satellite midnight (4:09, 4:39, 5:09 and 5:39) and 5:45 UTC Full Disk will be positively effected by the new correction algorithm. Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and/or SPSD.UserServices@noaa.govfor comments. Web Site(s) for applicable 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 ftp://ftp.oso.noaa.gov/Public/Goes/StrayLightCorrection_Documents/ for "Poster_Stray_Light_Correction" and additional stray light 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. 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. --00235452ffec2fa22f04b8770b60 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Topic: GOES-13 (GOES-East) Stray Light Correction Operations Test is schedu= led for February 9, 2012 at 1535 UTC

Date/Time Issued: February 8, 2= 012 1715 UTC

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

Date/Time of Initial Impact: February 9, 2012 15:35 UTC

Date/Tim= e of Expected End: February 10, 2012 15:35 UTC

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

Details/Specifics of Change:
This Eclipse = Season GOES ground system is including a new algorithm to correct for conta= mination for stray light from sun when it is within 20 degrees. Solar conta= mination 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 im= ages without any interruption hence a better monitoring of the earth-ocean-= atmosphere system. The algorithm will work in real time and within the Sens= or Processing System (SPS) resulting in corrected GVAR stream to the users.= The stray light correction and minimum sun angle for each line will be inc= luded in the GVAR stream in Block-0 so the users can opt not to use any lin= e or frame when too close to the sun.

There will be a 24-hour GOES-13 (GOES-East) Stray Light Correction Oper= ations Test scheduled for tomorrow, Thursday, February 9, 2012 at 1535 UTC = for users to ingest corrected images and address any issues they may have. = For the coming eclipse seasons, beginning on February 15, 2012, the stray l= ight correction will be performed continuously for GOES-13 (GOES-East) avoi= ding any image cancellations. It will be followed by GOES-15 (GOES-West) du= ring Fall-2012 Eclipse Season.

This version of ground software also updates GVAR block 0 with the stra= y light status including the minimum sun angle to each line and the locatio= n 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 also be downloaded from the GVAR Download pag= e 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 p= roducts are affected adversely.

PLEASE NOTE: During this 24-hour test, SHEMI images within 60 minutes o= f satellite midnight (4:09, 4:39, 5:09 and 5:39) and 5:45 UTC Full Disk wil= l be positively effected by the new correction algorithm.

Contact In= formation 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 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 GVA= R information.
See ftp://ftp.oso.noaa.gov/Public/Goes/StrayLightCorr= ection_Documents/=20 for "Poster_Stray_Light_Correction" and additional stray light in= formation.
See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other satel= lite related messages.
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/ecl= ipse.html for full eclipse schedules.

This message was sent to = ESPC.Notification@noaa.gov. You have been sent this and other notificat= ions because you have opted in to receive it. If for any reason, you wish t= o 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. <= br> --00235452ffec2fa22f04b8770b60--