NOAA-18, HIRS,High Speed Dwell, Implementation Date 22 August 2005- Issued: Date issued 19 August 2005; time issued 1810 UTC

HIRS instrument to be configured to high speed dwell

*Date/Time(UTC) Message Issued:*
19 August 2005 1810 UTC

*Satellite(s) Involved:*

*Instrument(s) Involved:*

*Product(s) Involved/Affected:*
All current products using NOAA-18 data

*Date/Time(UTC) of Initial Implementation:*
22 August 2005 17:28:40 UTC

*Details/Specifics of Change:*
Configuration to high speed dwell on the HIRS filter wheel motor current for 2-5 minutes and then returen to normal operational mode. This will be done to investigate the HIRS longwave radiometric noise anomaly. During the test period no science and
CPU data will be available. This test should not cause any long term impact. The test will end at 17:43:20 UTC.

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

Emily Harrod
Physical Scientist
301-457-5247 ext 117

Cecil Paris
Physical Scientist
301-457-5247 ext 129

*Web site(s) that contain other relevant information (where applicable):* - History of level 1B notices - All user notices - SOCC polar satellites status - SOCC morning reports

* Emily D. Harrod
* Product Systems Branch
* Pre-Product Processing Group
* E/SP13, Federal Building #4, room 0318
* 5200 Auth Road
* Suitland, Maryland 20746-4304
* voice 301-457-5247 ext 117
* fax 301-457-5199
* email