Instrument : Infrared Thermometer (IRT)

Instrument Categories
Radiometric, Surface/Subsurface Properties

Picture of the Infrared Thermometer (IRT)

General Overview

The Infrared Thermometer (IRT) is a ground-based radiation pyrometer that provides measurements of the equivalent blackbody brightness temperature of the scene in its field of view. The downwelling version has a narrow field of view for measuring sky temperature and for detecting clouds. The upwelling version has a wide field of view for measuring the narrowband radiating temperature of the ground surface.

Output Datastreams

  • irt : Infrared Thermometer: Sky brightness temperature
  • irt10m : Infrared Thermometer: Ground surface temperature averaged 60-sec at 10-meter height
  • irt200ms : Infrared Thermometer: Sky brightness temperature, 5-Hz instantaneous
  • irt25m : Infrared Thermometer: Ground surface temperature, averaged 60-second at 25-meter height
  • irt2s : Infrared Thermometer: Sky brightness temperature, instantaneous 2-second

Primary Measurements

The following measurements are those considered scientifically relevant.


Eastern North Atlantic
ENAC1 Browse Data Browse PlotsGraciosa Island, Azores, Portugal
North Slope Alaska
NSAC1 Browse DataCentral Facility, Barrow AK
Southern Great Plains
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK
SGPE1 Browse DataLarned, KS
SGPE2 Browse DataHillsboro, KS (Extended)
SGPE3 Browse DataLeRoy, KS
SGPE4 Browse DataPlevna, KS
SGPE5 Browse Data Browse PlotsHalstead, KS
SGPE6 Browse DataTowanda, KS
SGPE7 Browse DataElk Falls, KS
SGPE8 Browse DataColdwater, KS
SGPE9 Browse DataAshton, KS
SGPE10 Browse DataTyro, KS
SGPE11 Browse DataByron, OK
SGPE12 Browse DataPawhuska, OK
SGPE13 Browse DataLamont, OK (Extended)
SGPE15 Browse DataRingwood, OK
SGPE16 Browse DataVici, OK (Extended)
SGPE18 Browse DataMorris, OK (Extended)
SGPE19 Browse DataEl Reno, OK
SGPE20 Browse DataMeeker, OK (Extended)
SGPE21 Browse DataOkmulgee, OK
SGPE22 Browse DataCordell, OK
SGPE24 Browse DataCyril, OK
SGPE27 Browse DataEarlsboro, OK
SGPE31 Browse DataAnthony, KS
SGPE32 Browse DataMedford, OK
SGPE33 Browse DataNewkirk, OK
SGPE34 Browse DataMaple City, KS
SGPE35 Browse DataTryon, OK
SGPE36 Browse DataMarshall, OK
SGPE37 Browse DataWaukomis, OK
SGPE38 Browse DataOmega, OK
Tropical Western Pacific
TWPC1 Browse DataCentral Facility, Manus I., PNG
TWPC2 Browse DataCentral Facility, Nauru Island
TWPC3 Browse DataCentral Facility, Darwin, Australia
ARM Mobile Facility
FKBM1 Browse DataBlack Forest, Germany
GRWM1 Browse DataGraciosa Island, Azores, Portugal
MAGM1 Browse Data Browse PlotsLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit
MAOM1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; AMF1
NIMM1 Browse DataNiamey, Niger
OLIM1 Browse Data Browse PlotsOliktok Point, Alaska
PVCM1 Browse Data Browse PlotsHighland Center, Cape Cod MA; AMF 1
PYEM1 Browse DataPoint Reyes, CA
TMPM1 Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AMF2


Victor Morris
(509) 372-6144