Subject: NOAA-16, HIRS, Turn On Filter Housing Heater - Impact on Processing, This is a multi-part message in MIME format. --------------030400060803080003020009 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Topic: Turn on HIRS Filter Housing Heater NOAA-16, Impact on Processing Date/Time(UTC) Message Issued: 10 January 2005, 1900 UTC Satellite(s) Involved: NOAA-16 Instrument(s) Involved: HIRS Product(s) Involved/Affected: All Products using HIRS Date/Time(UTC) of Initial Implementation: 10 January 2005, 1600 UTC Details/Specifics of Change: On 10 January 2005 at 16:00 UTC the HIRS Filter Housing Heater on NOAA-16 was turned on. The Information Processing Division modified its level 1B processing to prevent calibration contamination while the heater is on. Lunar contamination detection and correction was turn off beginning with this pass, N1S.GHRR.NL.D05010.S1551.E1722.B2218384.WI. This will keep us from erroneously identifying lunar effects when there are none. We discontinue the 24 hour calibration data updates to prevent contamination from corrupted data. Normal processing will resume after the heater is turned off and 24 hours of good data have been processed. After the heater turn on, SOCC reported the following: "The HIRS filter heater was turned on at 11 AM Eastern time today, Monday 10 Jan. The first pass following the turnon showed numerous thermal limit violations. The filter motor temp jumped about 5 degrees C (from 22 degs to 27.5 degs one orbit after the heater was turned on). The HIRS filter housing temps (1- 4) jumped up to RED HIGHS (29.7 degs C) but all these temps appear to have leveled off . The HIRS filter motor current seemed to fall a small amount from peaking at 165 mAMps before the heater turnon to peaking at 162 mAMps after. Engineering is continuing to monitor and will report as more data is collected." Contact Person(s) Name/Email/Phone Number for Questions: Dr. Changyong Cao changyong.cao@noaa.gov 301-763-8136 ext 196 - HIRS instrument scientist Robert Levin robert.levin@noaa.gov 301-452-5247 ext 129 - operations support physical scientist Web site(s) that contain other relevant information (where applicable): 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 -- ******************************************* * * Emily D. Harrod * NOAA/NESDIS/OSDPD/IPD * Product Systems Branch * Pre-Product Processing Group * E/SP13, 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 * ******************************************* --------------030400060803080003020009 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Topic:
Turn on HIRS Filter Housing Heater NOAA-16, Impact on Processing

Date/Time(UTC) Message Issued:
10 January 2005, 1900 UTC

Satellite(s) Involved:
NOAA-16

Instrument(s) Involved:
HIRS

Product(s) Involved/Affected:
All Products using HIRS

Date/Time(UTC) of Initial Implementation:
10 January 2005, 1600 UTC

Details/Specifics of Change:

On 10 January 2005 at 16:00 UTC the HIRS Filter Housing Heater on NOAA-16 was turned on. The Information Processing Division modified its level 1B processing to prevent calibration contamination while the heater is on. Lunar contamination detection and correction was turn off beginning with this pass, N1S.GHRR.NL.D05010.S1551.E1722.B2218384.WI. This will keep us from erroneously identifying lunar effects when there are none. We discontinue the 24 hour calibration data updates to prevent contamination from corrupted data. Normal processing will resume after the heater is turned off and 24 hours of good data have been processed.

After the heater turn on, SOCC reported the following:
"The HIRS filter heater was turned on at 11 AM Eastern time today, Monday 10 Jan. The first pass following the turnon showed numerous thermal limit violations. The filter motor temp jumped about 5 degrees C (from 22 degs to 27.5 degs one orbit after the heater was turned on). The HIRS filter housing temps (1- 4) jumped up to RED HIGHS (29.7 degs C) but all these temps appear to have leveled off . The HIRS filter motor current seemed to fall a small amount from peaking at 165 mAMps before the heater turnon to peaking at 162 mAMps after. Engineering is continuing to monitor and will report as more data is collected."

Contact Person(s) Name/Email/Phone Number for Questions:

Dr. Changyong Cao changyong.cao@noaa.gov 301-7 HIRS instrument scientist
Robert Levin robert.levin@noaa.gov 301-452-5247 ext 129 - operations support physical scientist

Web site(s) that contain other relevant information (where applicable):
     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

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*******************************************
*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Product Systems Branch
* Pre-Product Processing Group
* E/SP13, 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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