From:
Mon 2:19 PM
Subject: NOAA-16, HIRS, Turn On Filter Housing Heater - Impact on Processing, Implementation Date 10 January 2005 - Issued: 10 January 2005, 1900 UTC
Resent-From: nesdis.osdpd.ipd.Level-1B.notices@noaa.gov,
nesdis.osdpd.ipd.contractors@noaa.gov
To: undisclosed-recipients:;
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
*