Subject: NOAA-15 , HIRS, HIRS Anomaly Update, Implementation Date 17 April 2005 - Issued: 18 April 2005, 1745 UTC
Topic:
Date/Time(UTC) Message Issued:
Satellite(s) Involved:
Instrument(s) Involved:
Product(s) Involved/Affected:
Date/Time(UTC) of Initial Implementation:
Details/Specifics of Change:
Follow-up report: "Imagery was OK at the start of the major surge (17 Apr 13:00Z), and completely corrupted on all channels on the next pass at 14:40Z (the same pass heater turnon occurred) and remained corrupted through the most recent pass today at 14:20Z after heater was turned back off."
SOCC engineers continue to monitor and investigate the anomaly.
Contact Person(s) Name/Email/Phone Number for Questions:
Web site(s) that contain other relevant information (where applicable):
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From:
"Emily Harrod"
Date:
Mon, 18 Apr 2005 13:45:46 -0400
To:
undisclosed-recipients:;
NOAA-15 HIRS Filter Wheel Problem Continues
18 April 2005/1745 UTC
NOAA-15
HIRS
All Products using HIRS instrument on NOAA-15
17 January 2005, 1500 UTC
Official notification from SOCC reports: "At approximately 13:00Z on Sunday, 17 Apr, the N15 HIRS filter motor current soared to red high limits of 320+ mAmps. This surge was accompanied by greatly increased temperatures as well as very erratic period monitor values and intermittent loss of filter wheel synch. At 14:52Z, ..., EMOSS engineers turned on the HIRS filter motor heater. Shortly thereafter, the filter motor current surged again to its highest levels ever (408 mAmps) with accompanying high temperatures and a steady loss of filter wheel synch. Plans are to turn the heater back off on Monday, 14:20Z to determine if this will improve the HIRS situation. If it does not, a downgrade in status to RED is under consideration. Additional information will be provided as it is obtained. It is assumed that all HIRS products are degraded at this time..."
Renee Smith-Dearing, 301-817-4117, renee.smith@noaa.gov - SOCC POES Engineering
Emily Harrod, 301-452-5247 ext 117, emily.harrod@noaa.gov - IPD operations support
http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B notices
http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices
http://www.oso.noaa.gov/poesstatus/ - SOCC polar satellites status
http://www.oso.noaa.gov/daily-news/index.htm - SOCC morning reports
"The contents of this message are mine personally and do not necessarily reflect any position of the Government or the National Oceanic and Atmospheric Administration."
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, Federal Building #4, room 0318
* 5200 Auth Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-457-5247 ext 117
* fax 301-457-5199
* email Emily.Harrod@noaa.gov
*
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ppp@nesdis.noaa.gov
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