Subject: Administrative: GOES-13 and -15 Visible Calibration Update This is a multi-part message in MIME format. --Boundary_(ID_ba/kncL+lE1tMqOK+CyRTg) Content-type: text/plain; charset=utf-8; format=flowed Content-transfer-encoding: 7BIT *Topic: *GOES-13 and -15 Visible Calibration Update for the Month of January 2018 *Date/Time Issued: *January 27, 2018 00:07 UTC *Product(s) or Data Impacted: *All products from visible channel *Date/Time of Initial Impact: *January 09, 2018 09:30 UTC *Date/Time of Expected End:* Until Next Month's Coefficient Update *Length of Outage: *N/A *Details and Specifics of Change: *On 09 January 2018, the following update of the calibration coefficients, based on post-launch vicarious calibration at NOAA/NESDIS/STAR, was due to be implemented for the Imager visible channel of GOES-15 at 0930Z; the change was actually implemented in the GVAR, late, on 17 January 2018 at 0930Z. These coefficients are intended to be optimal on 23 January, two weeks after the expected implementation date. *GOES-15:* The following update of the calibration coefficients, based on post-launch vicarious calibration at NOAA/NESDIS/STAR, are recommended for the currently operational GOES Imager visible channel. These coefficients are to be implemented on the second Tuesday of the Update Month listed below and optimal on the fourth Tuesday of the Update Month (in the middle of the two scheduled updates). Satellite: GOES-15 Update Month: January Update Year: 2018 Current post-launch calibration coefficient: 1.52140 Date: 2017360000000000 Previous post-launch calibration coefficient: 1.51704 Date: 2017332000000000 Initial calibration coefficient: 1.0 Initial calibration date: 2001114000000000 *GOES-13:* The broadcast of GOES-13 GVAR ended 08 January 2018, one day before the following coefficient changes were due to be implemented (on 09 January, 2018).The new coefficients are provided in this notice for the sake of completeness. The following update of the calibration coefficients, based onpost-launch vicarious calibration at NOAA/NESDIS/STAR, are recommended for the currently operational GOES Imager visible channel. These coefficients are to be implemented on the second Tuesday of the Update Month listed below and optimal on the fourth Tuesday of the Update Month (in the middle of the two scheduled updates). Satellite: GOES-13 Update Month: January Update Year: 2018 Current post-launch calibration coefficient: 1.43881 Date: 2017360000000000 Previous post-launch calibration coefficient: 1.43542 Date: 2017332000000000 Initial calibration coefficient: 1.0 Initial calibration date: 2000229000000000 Some definitions: The date format is: YYYYDDDHHMMSSmmm, where YYYY = year, DDD = day of the year, HH = hour, MM = minute, SS = seconds, mmm = msec. The coefficient provided is a gain that is to be applied to the Visible channel counts-to-radiance conversion Op_R = Coefficient * Pre_R where Pre_R is pre-launch gain for the channel and Op_R is the new gain -- the gain after the coefficient listed as "Current post-launch calibration coefficient" is applied. The initial coefficient has been normalized to 1.0 for the purposes of this post-launch calibration. *Contact Person(s) Name/Email/Phone Number for Questions: *Paul Douglas, jpaul.douglas@noaa.gov , desk phone 301-817-4031 operations support Xiangqian Wu Xiangqian.Wu@noaa.gov __>_301-763-8136 x 138 instrument scientist *Web site(s) that contain other relevant information (where applicable):* http://www.star.nesdis.noaa.gov/smcd/spb/fwu/homepage/GOES_Imager_Vis_OpCal.php *Contact Information for Further Information:* ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and/or other contacts as necessary This message was sent from 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 make take up to two business days to process your unsubscribe request. --Boundary_(ID_ba/kncL+lE1tMqOK+CyRTg) Content-type: text/html; charset=utf-8 Content-transfer-encoding: 8BIT

Topic:  GOES-13 and -15 Visible Calibration Update for the Month of January 2018

Date/Time Issued: January 27, 2018 00:07 UTC

Product(s) or Data Impacted:   All products from visible channel

Date/Time of Initial Impact:   January 09, 2018 09:30 UTC

Date/Time of Expected End:  Until Next Month's Coefficient Update

Length of Outage:  N/A

Details and Specifics of Change:  On 09 January 2018, the following update of the calibration coefficients, based on post-launch vicarious calibration at NOAA/NESDIS/STAR, was due to be implemented for the Imager visible channel of GOES-15 at 0930Z; the change was actually implemented in the GVAR, late, on 17 January 2018 at 0930Z. These coefficients are intended to be optimal on 23 January, two weeks after the expected implementation date.

GOES-15:

The following update of the calibration coefficients, based on post-launch vicarious calibration at NOAA/NESDIS/STAR, are recommended for the currently operational GOES Imager visible channel. These coefficients are to be implemented on the second Tuesday of the Update Month listed below and optimal on the fourth Tuesday of the Update Month (in the middle of the two scheduled updates).

Satellite: GOES-15
Update Month: January
Update Year: 2018
Current post-launch calibration coefficient: 1.52140
Date: 2017360000000000
Previous post-launch calibration coefficient: 1.51704
Date: 2017332000000000
Initial calibration coefficient: 1.0
Initial calibration date: 2001114000000000

GOES-13:

The broadcast of GOES-13 GVAR ended 08 January 2018, one day before the following coefficient changes were due to be implemented (on 09 January, 2018).  The new coefficients are provided in this notice for the sake of completeness.

The following update of the calibration coefficients, based on post-launch vicarious calibration at NOAA/NESDIS/STAR, are recommended for the currently operational GOES Imager visible channel. These coefficients are to be implemented on the second Tuesday of the Update Month listed below and optimal on the fourth Tuesday of the Update Month (in the middle of the two scheduled updates).

Satellite: GOES-13
Update Month: January
Update Year: 2018
Current post-launch calibration coefficient: 1.43881
Date: 2017360000000000
Previous post-launch calibration coefficient: 1.43542
Date: 2017332000000000
Initial calibration coefficient: 1.0
Initial calibration date: 2000229000000000

Some definitions:

The date format is: YYYYDDDHHMMSSmmm, where YYYY = year, DDD = day of the year, HH = hour, MM = minute, SS = seconds,

mmm = msec.

The coefficient provided is a gain that is to be applied to the Visible channel counts-to-radiance conversion

Op_R = Coefficient * Pre_R

where Pre_R is pre-launch gain for the channel and Op_R is the new gain -- the gain after the coefficient listed as

"Current post-launch calibration coefficient" is applied.

The initial coefficient has been normalized to 1.0 for the purposes of this post-launch calibration.

Contact Person(s) Name/Email/Phone Number for Questions:
Paul Douglas, jpaul.douglas@noaa.gov, desk phone 301-817-4031operations support
Xiangqian Wu Xiangqian.Wu@noaa.gov <mailto:Xiangqian.Wu@noaa.gov> 301-763-8136 x 138 instrument scientist

Web site(s) that contain other relevant information (where applicable):

http://www.star.nesdis.noaa.gov/smcd/spb/fwu/homepage/GOES_Imager_Vis_OpCal.php

Contact Information for Further Information:  ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and/or other contacts as necessary

This message was sent from 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 make take up to two business days to process your unsubscribe request.

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