Topic: Metop-A MHS Channel 2 Failure Due to Noise Increase

Date/Time Issued: February 14, 2020 2258Z

Product(s) or Data Impacted: MHS Products

Date/Time of Initial Impact: November 15, 2019 0000Z

Date/Time of Expected End: Never

Length of Outage: Ongoing

Impacts on Users and Significance: MHS products are affected.

Details/Specifics of Change:
The Metop-A MHS channel 2 has quickly degraded from Nov 2019 through January 2020. In
that time period, the NEDT changed from around 5K to around 20K, and the gain decreased
from around ten counts per Kelvin to two counts per Kelvin. As a result, this channel will be
declared as failed. Channel 2 L1b data will continue to be processed and made available along
with those of other Metop-A MHS channels.

Contact Information for Further Information: ESPC Operations at at 301-817-3880 and/or other contacts as necessary

Web Site(s) for applicable information: N/A

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