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Instruments > Earth Remote Sensing Instruments > Passive Remote Sensing > Profilers/Sounders > SSM/T

Preferred term

SSM/T  

Definition

  • [Source: National Space Science Data Center, http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1990-105A-02 ] The microwave temperature sounder, SSM/T, is a seven-channel scanning radiometer which measures radiation in the 5- to 6-mm wavelength (50- to 60-GHz) region (specifically 50.5, 53.2, 54.35, 54.9, 58.4, 58.825, and 59.4 GHz) to provide data on vertical temperatures from the earth's surface to above 30 km. The SSM/T operates in the absorption band of molecular oxygen. By choosing frequencies with different absorption coefficients on the wing of the oxygen absorption band, a series of weighting functions peaking at preselected altitudes is obtained. The radiometer scans across the nadir track on seven scan positions and two calibration positions (cold sky and 300 deg K). The dwell time for the crosstrack and calibration positions is 2.7 s each. The total scan period is 32 s. The instrument has an instantaneous field of view of 12 deg and scans plus or minus 36 deg from nadir. Group: Instrument_Details Entry_ID: SSM/T Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Passive Remote Sensing Instrument_Type: Profilers/Sounders Short_Name: SSM/T Long_Name: Special Sensor Microwave/Temperature End_Group Group: Associated_Platforms Short_Name: DMSP 5D-3/F16 Short_Name: DMSP 5D-3/F15 Short_Name: DMSP 5D-2/F14 Short_Name: DMSP 5D-2/F13 Short_Name: DMSP 5D-2/F12 Short_Name: DMSP 5D-2/F11 Short_Name: DMSP 5D-2/F10 Short_Name: DMSP 5D-2/F8 Short_Name: DMSP 5D-2/F7 Short_Name: DMSP 5D-1/F4 End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Microwave Spectral_Frequency_Coverage_Range: 50.5, 53.2, 54.35, 54.9, 58.4, 58.825, and 59.4 GHz End_Group Online_Resource: http://www.ngdc.noaa.gov/dmsp/sensors/ssmt.html Group: Instrument_Logistics Instrument_Owner: Department of Defense-Department of the Air Force (United States) End_Group End_Group (en)

Broader concept

URI

https://gcmd.earthdata.nasa.gov/kms/concept/eff0bf28-0b98-4ad8-9d00-e83aa9a6245e

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