Update # 1 :The initial notice incorrectly stated that the emissive band data is only valid for calibration purposes. For clarification, due to the VIIRS blackbody temperature changes during the calibration, the VIIRS science data quality may be affected for certain applications, but the data is expected to remain within specification.
Topic: N20 VIIRS Emissive Band Calibration
Date/Time Issued: February 11, 2021 1744Z
Product(s) or Data Impacted: All N20 VIIRS Emissive Bands
Date/Time of Initial Impact: March 29, 2021 0600Z
Date/Time of Expected End: March 31, 2021 0400Z
Length of Outage: See Details. Details/Specifics of change: On March 29, 2021 at 06:00z, N20 VIIRS will perform its annual Emissive Band Calibration. The emissive band data during this time period will be invalid. It will only be valid for calibration purposes. Below is a timeline of the blackbody heating/cooling cycle:
March 29 06:00z - BB to 297.5K
March 29 09:00z - BB to 302.5K
March 29 12:00z - BB to 307.5K
March 29 15:00z - BB to 312.5K
March 29 18:00z - BB to 315K
March 29 21:00z - BB temperature control off
March 30 21:00z - BB temperature control on and set to 272.5K
March 31 00:00z - BB to 282.5K
March 31 03:00z - BB to 292.5K
Web Site(s) for applicable information: N/A
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