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High Resolution Infrared Sounder/3 (HIRS /3)

NSSDCA ID: 1998-030A-02

Mission Name: NOAA 15
Principal Investigator:Dr. D. Work


The improved High Resolution Infrared Sounder/3 (HIRS/3) on the Advanced TIROS-N (ATN) NOAA K-N series of polar orbiting meteorological satellites is a 20-channel, step-scanned, visible and IR spectrometer designed to provide atmospheric temperature and moisture profiles. The HIRS/3 instrument is basically identical to the HIRS/2 flown on previous spacecraft except for changes in six spectral bands to improve the sounding accuracy. The HIRS/3 is used to derive water vapor, ozone, and cloud liquid water content. The instrument scans 49.5 degrees on either side of the orbital track with a ground resolution at nadir of 17.4 km. The instrument produces 56 IFOVs for each 1,125 km scan line at 42 km between IFOVs along-track. The instrument consists of 19 IR and 1 visible channel centered at 14.95, 14.71, 14.49, 14.22, 13.97, 13.64, 13.35, 11.11, 9.71, 12.45, 7.33, 6.52, 4.57, 4.52, 4.47, 4.45, 4.13, 4.0, 3.76, and 0.69 microns.

Alternate Names

  • HIRS/3
  • NOAA15/HIRS/3

Facts in Brief

Mass: 34 kg
Power (avg): 22.7 W
Bit rate (avg): 3.32 kbps

Funding Agency

  • NOAA National Environmental Satellite Service (United States)


  • Earth Science: Atmospheric Dynamics

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. D. WorkPrincipal InvestigatorNOAA Office of Research and Application
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