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 retired
SGPE2 Browse DataHillsboro, KS (Extended) retired
SGPE3 Browse DataLeRoy, KS retired
SGPE4 Browse DataPlevna, KS retired
SGPE5 Browse Data Browse PlotsHalstead, KS retired
SGPE6 Browse DataTowanda, KS retired
SGPE7 Browse DataElk Falls, KS retired
SGPE8 Browse DataColdwater, KS retired
SGPE9 Browse DataAshton, KS
SGPE10 Browse DataTyro, KS retired
SGPE11 Browse DataByron, OK
SGPE12 Browse DataPawhuska, OK
SGPE13 Browse DataLamont, OK (Extended)
SGPE15 Browse DataRingwood, OK
SGPE16 Browse DataVici, OK (Extended) retired
SGPE18 Browse DataMorris, OK (Extended) retired
SGPE19 Browse DataEl Reno, OK retired
SGPE20 Browse DataMeeker, OK (Extended) retired
SGPE21 Browse DataOkmulgee, OK
SGPE22 Browse DataCordell, OK retired
SGPE24 Browse DataCyril, OK retired
SGPE27 Browse DataEarlsboro, OK retired
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 retired
TWPC2 Browse DataCentral Facility, Nauru Island retired
TWPC3 Browse DataCentral Facility, Darwin, Australia retired
ARM Mobile Facility
ACXM1 Browse DataOff the Coast of California - NOAA Ship Ronald H. Brown; AMF2
FKBM1 Browse DataBlack Forest, Germany retired
GRWM1 Browse DataGraciosa Island, Azores, Portugal retired
MAGM1 Browse Data Browse PlotsLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit; AMF2 retired
MAOM1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; AMF1
NIMM1 Browse DataNiamey, Niger retired
OLIM1 Browse Data Browse PlotsOliktok Point, Alaska
PVCM1 Browse Data Browse PlotsHighland Center, Cape Cod MA; AMF 1 retired
PYEM1 Browse DataPoint Reyes, CA retired
TMPM1 Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AMF2
 retired = Originating instrument has been retired at this location


Victor Morris
Pacific Northwest National Laboratory
(509) 372-6144