Administrative, NOAA-18 Reduced Gyro Test on 23 and 24 March 2011 - Issued: 17 March 2011 1830 UTC

NOAA-18 Reduced Gyro Test

Date/Time(UTC) Message Issued:
March 17, 2011, 1830 UTC

Satellite(s) Involved:

Instrument(s) Involved:
All Instruments

Product(s) Involved/Affected:
All data and products from NOAA-18 (AVHRR, AMSU-A, AMSU-B, HIRS, MHS, SBUV)

Date/Time(UTC) of Initial Implementation:
March 23, 2011, Time 11:39 UTC

Date/Time(UTC) of Expected End:
March 24, 2011, Time 18:09 UTC

Details/Specifics of Change:
From 23 Mar 2011 at 11:39 UTC (orbit 30083) to 24 Mar 2011 at 18:09 UTC (orbit 30101), NOAA-18 will be placed into the Reduced Gyro Mode for a test. Products may be impacted with a slightly larger than normal attitude disturbances during this period. The performance of NOAA-18 instrument L1b data is expected to be similar to the counterpart of NOAA-15, which has been operated in the Reduced Gyro Mode since March 17, 2010.

The test will be ended on March 24th on REV 30101 AOS 17:55:20 UTC, and the spacecraft reconfigured for normal operation. The spacecraft will be commanded back to nominal mode on REV 30103 at 21:27:30.

Products that use NOAA-18 that will be affected:

- ATOVS Polar Soundings

- Radiation Budget

- Fire Identification Mapping and Monitoring Algorithm (FIMMA) for Hazard Mapping system (HMS) input


- SST and Coastwatch

- Microwave Surface and Precipitation Products (MSPPS)

- Microwave Integrated Retrieval System (MIRS)

- Blended TPW

- Ozone: SBUV/2

- Ozone: TOAST

- Ensemble Tropical Rainfall Potential (eTRaP)

- Global Vegetation Index Products (GVI)

- AVHRR Winds

Contact Person(s) Name/Email/Phone Number for Questions:
ESPC Operations Crew Leader at and 301-817-3880 ESPC helpdesk