Subject: Administrative: Metop -A HIRS 4-Week Test Issued: September 2, This is a multi-part message in MIME format. --Boundary_(ID_KxWTrCRx5ZfYtMvA7QkE8A) Content-type: text/plain; charset=utf-8; format=flowed Content-transfer-encoding: 7BIT *Topic:*Metop-A HIRS 4-Week Test *Date/Time Issued: *September 2, 2016 2325Z *Product(s) or Data Impacted: *All products derived from HIRS Channels 1 - 10 will be degraded. *Date/Time of Initial Impact: *September 6, 2016 (JDAY 250) 1150Z *Date/Time of Expected End:*October 4, 2016 (JDAY 278) 1350Z *Length of Outage: *approximately 28 days* Details and Specifics of Change: *The Metop-A HIRS is suffering out-of-spec NEdT in channels 5 and 10, and degraded performance in the remaining longwave channels. This is believed to be an effect of Filter Wheel Motor degradation. The instrument vendor has recommended steps to heat the motor in an attempt to improve performance. The Filter Wheel Motor will be commanded to high power mode and the Filter Wheel Housing Heater will be commanded on. It will remain in this configuration for four weeks and then restored to its original configuration. All data from channels 1 - 10 are expected to be degraded during this period. Here are the anticipated times of commanding. Note that there will likely be lags in changes to the instrument performance as the HIRS heats up and cools down. All times are Z. * September 6, 2016 11:50Z: Filter Wheel High Power Mode * September 6, 2016 13:30Z: Filter Wheel Housing Heater On * October 4, 2016 12:10Z: Filter Wheel Housing Heater Off * October 4, 2016 13:50Z: Filter Wheel Normal Power Mode *Contact Information for Further Information:* ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 ** *Web Site(s) for Applicable Information:* See http://www.ssd.noaa.gov/PS/SATS/messages.html for this and other satellite related messages See http://www.eumetsat.int/website/home/Satellites/CurrentSatellites/Metop/indes.html for more information on the MetOp satellites 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 may take up to two business days to process your unsubscribe request. --Boundary_(ID_KxWTrCRx5ZfYtMvA7QkE8A) Content-type: text/html; charset=utf-8 Content-transfer-encoding: 8BIT

Topic: Metop-A HIRS 4-Week Test


Date/Time Issued: September 2, 2016 2325Z


Product(s) or Data Impacted: All products derived from HIRS Channels 1 - 10 will be degraded.


Date/Time of Initial Impact: September 6, 2016 (JDAY 250) 1150Z


Date/Time of Expected End: October 4, 2016 (JDAY 278) 1350Z


Length of Outage: approximately 28 days

Details and Specifics of Change:  The Metop-A HIRS is suffering out-of-spec NEdT in channels 5 and 10, and degraded performance in the remaining longwave channels.  This is believed to be an effect of Filter Wheel Motor degradation.  The instrument vendor has recommended steps to heat the motor in an attempt to improve performance.  The Filter Wheel Motor will be commanded to high power mode and the Filter Wheel Housing Heater will be commanded on.  It will remain in this configuration for four weeks and then restored to its original configuration.  All data from channels 1 - 10 are expected to be degraded during this period.


Here are the anticipated times of commanding.  Note that there will likely be lags in changes to the instrument performance as the HIRS heats up and cools down.  All times are Z.


  • September 6, 2016 11:50Z: Filter Wheel High Power Mode
  • September 6, 2016 13:30Z: Filter Wheel Housing Heater On
  • October 4, 2016 12:10Z: Filter Wheel Housing Heater Off
  • October 4, 2016 13:50Z: Filter Wheel Normal Power Mode

Contact
Information for Further Information:  ESPC
Operations at ESPCOperations@noaa.gov at 301-817-3880 



Web Site(s) for Applicable
Information:
See http://www.ssd.noaa.gov/PS/SATS/messages.html
for this and other satellite related messages

See http://www.eumetsat.int/website/home/Satel
for more information on the MetOp satellites

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 may take up to two business days to process your unsubscribe request. 


 
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