Topic: GOES-15 Visible Calibration Update
for the Month of December 2018
Date/Time Issued: December
11, 2018 21:40Z
Product(s) or Data Impacted: All products from visible channel
Date/Time of Initial Impact:
December 11, 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 11 December 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 25 December, 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, is recommended for the currently operational GOES-15 Imager visible channel. These coefficients are expected 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).
Update Month: December
Update Year: 2018
Current post-launch calibration coefficient: 1.57470
Previous post-launch calibration coefficient: 1.57019
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 conversionOp_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.
Person(s) Name/Email/Phone Number for Questions:
Paul Douglas, email@example.com, 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):
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