Date/Time Issued: September 20, 2019 2330Z
or Data Impacted: All Products from visible channel
Date/Time of Initial Impact: September 10, 2019 0930Z
Date/Time of Expected End: Until Next Month's Coefficient Update
Length of Outage: N/A
**This is a late notification.**
Details and Specifics of Change: On 10 September 2019, 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 24 September, 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: September
Update Year: 2019
Current post-launch calibration coefficient: 1.61939
Previous post-launch calibration coefficient: 1.61475
Initial calibration coefficient: 1.0
Initial calibration date: 2001114000000000
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
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
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