NOAA-16/17 AVHRR Channel 3a/3b Configuration, 1 May 2003 - Issued: 27 March 2003; 2200 UTC

Thu 5:00 PM
Subject: NOAA-16/17 AVHRR Channel 3a/3b Configuration, 1 May 2003 - Issued: 27 March 2003; 2200 UTC

AVHRR Channel 3a/3b Switching Scheme

Date/Time(UTC) Message Issued:
27 March 2003, 2200 UTC

Satellite(s) Involved:
NOAA-16 and 17

Instrument(s) Involved:

Product(s) Involved/Affected:
Channel 3a and 3b Products

Date/Time(UTC) of Initial Implementation:
1 May 2003, Time TBD

Details/Specifics of Change:
NESDIS has reviewed the requirements for the use of AVHRR channels 3a and 3b
on the operational NOAA satellites. A "best scenario" operating
configuration has been determined for two satellite operations for NOAA-16
and 17. Beginning on May 1, the new configuration will be as follows:
Afternoon satellite (NOAA-16) - channel 3b always on (no 3a switching)
Morning satellite (NOAA-17) - switch channels at the terminator such that 3a
is on during daylight and 3b is on during night

Should we go to a single satellite operation, a new scenario will be

This decision was made after analysis of information provided by each of the
offices of NESDIS. In summary, the analysis concluded that channel 3a is
required only from one satellite, once per day, either AM or PM for most
products and research needs for the next two years. The selected scenario
was determined to be the best compromise to best address competing
requirements. It allows us to meet the 3b requirements for all products
and provide continuous global coverage for fire detection and monitoring.

Contact Person(s) Name/Email/Phone Number for Questions: ext. 117 or ext. 122

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

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