Topic: GOES-15 Visible Calibration Update for the Month of February 2018

Date/Time Issued: February 13, 2018 1855Z

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

Date/Time of Initial Impact: February 13, 2018 09:30Z

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

Length of Outage: N/A

Details and Specifics of Change:

On 13 February 2018, the following update of the calibration coefficients, based on post-launch vicarious calibration at NOAA/NESDIS/STAR, was implemented for the Imager visible channel of GOES-15 at 0930Z. These coefficients are intended to be optimal on 27 February, two weeks after the implementation date.

This notification no longer includes updates to the Imager visible channel calibration coefficients for GOES-13, since GOES-13 is no longer GOES-EAST.

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: February
Update Year: 2018
Current post-launch calibration coefficient: 1.52686
Date: 2018030000000000
Previous post-launch calibration coefficient: 1.52140
Date: 2017360000000000
Initial calibration coefficient: 1.0
Initial calibration date: 2001114000000000

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:

Dejiang.Han Dejiang.Han@noaa.gov <mailto:Dejiang.Han@noaa.gov> 301-817-4119 operations support

Xiangqian Wu Xiangqian.Wu@noaa.gov <mailto:Xiangqian.Wu@noaa.gov> 301-683-3601 instrument scientist

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

http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B notices

http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices

http://www.oso.noaa.gov/poes/index.htm - SOCC polar satellite status

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.