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Instrument Information

Identifier: ATMS > Advanced Technology Microwave Sounder
Docucomp UUID: 8293FAD4B8EC75F2E040AC8C5AB4576F
Instrument / Gear: Instrument
Instrument Type: Sounder
Description:

Instrument Type: Sounder, Operational Mode: crosstrack, Collection Type: radar, Other Information: The 22 channels of the ATMS are divided into two groups: a low frequency (23 to 57 GHz) group and a high-frequency (88 to 183 GHz) group. The low-frequency group, channels 1-15, are primarily used for temperature soundings. The high-frequency group, channels 16-22, are primarily for humidity soundings. Each group has an antenna aperture followed by a diplexing subsystem to further seperate the channels. The scanner completes one 360-degree rotation every 2.67 seconds. A major porton of the scan is spent receiving data from the Earth and executing the warm and cold calibrations. The scanning angular speed remains constant during the Earth-viewing and calibration periods. The antenna accelerates as it moves between these periods. There are three antenna beam widths. Temperature sounding channels have a beam width of 2.2 degrees, humidity channels have a beam wifth of 1.1 degrees. Channels 1 and 2 have a larger beam width of 5.2 degrees due to limited volume available on the spacecraft.

Record Created: April 10, 2018 2:05 PM UTC by edmjira.inport@noaa.gov
Record Last Modified: April 10, 2018 2:05 PM UTC by edmjira.inport@noaa.gov
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