Accession Number : ADA326607

Title :   Development of Experimental Protocols for the Calibration of SSM/T-2 Millimeter Wave Moisture Sounder Data.

Descriptive Note : Final rept. 25 Mar 92-24 May 96,

Corporate Author : ATMOSPHERIC AND ENVIRONMENTAL RESEARCH INC CAMBRIDGE MA

Personal Author(s) : Pickle, John D. ; Isaacs, Ronald G. ; Sarkisian, Charles P. ; Moncet, Jean-Luc ; Jakabhazy, Vida

PDF Url : ADA326607

Report Date : 24 MAY 1996

Pagination or Media Count : 183

Abstract : This report summarizes four years of the Phillips Laboratory and AER, Inc.'s efforts in the calibration of the DMSP SSM/T-2 millimeter wave moisture sounder. Thirteen underflights of the T-2 were made by the NASA ER-2 research aircraft which carried the MIR, an instrument similar to the T-2. Comparisons of the 183 GHz measurements over water FOVs displayed RMS differences of 0.9 to 1.6 K, roughly within the accuracy limits of the calibrating MIR instrument. The overall conclusion was that the T-2 suffered no significant bias in its calibration. An additional focus was to examine the T-2 sensitivity to the variability of the atmosphere: temperature and moisture profiles, surface temperature and emissivity, satellite viewing angle, clouds and precipitation. Also, with the failure of the 150 GHz channel on F-11 in June 1993, an additional challenge was to synthesize 150 GHz Tbs by a multiple regression method. This work highlighted the necessity of aircraft in the calibration of satellite sensors. In addition, the wealth of information collected during a calibration effort provided invaluable understanding of the sensor behavior and limitations, both essential to users of the satellite information.

Descriptors :   *METEOROLOGICAL SATELLITES, *MILLIMETER WAVE EQUIPMENT, *WATER VAPOR, DATA BASES, ATMOSPHERIC TEMPERATURE, RADIATIVE TRANSFER, METEOROLOGICAL DATA, MOISTURE CONTENT, REGRESSION ANALYSIS, RADIOSONDES, SURFACE TEMPERATURE, TROPOSPHERE, CLOUD PHYSICS, RESEARCH AIRCRAFT, HUMIDITY, SATELLITE IMAGERY.

Subject Categories : Meteorology
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE