Reality check: a point response function (PRF) comparison of theory to measurements for the clouds and the Earth's radiant energy system (CERES) tropical rainfall measuring mission (TRMM) instrument

Jack Paden; G. Louis Smith; Robert Benjamin Lee III; Dhirendra K. Pandey; Susan Thomas

doi:10.1117/12.280612

22 July 1997 Reality check: a point response function (PRF) comparison of theory to measurements for the clouds and the Earth's radiant energy system (CERES) tropical rainfall measuring mission (TRMM) instrument

Jack Paden, G. Louis Smith, Robert Benjamin Lee III, Dhirendra K. Pandey, Susan Thomas

Author Affiliations +

Proceedings Volume 3074, Visual Information Processing VI; (1997) https://doi.org/10.1117/12.280612
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

The first Clouds and Earth Radiant Energy System (CERES) scanning radiometer is scheduled to be launched on the joint US/Japanese Tropical Rainfall Measuring Mission in late 1997. The use of data from the CERES with those from higher resolution imagers requires a detailed knowledge of the CERES PRF, which describes the response of the radiometer to a point at a given location in the field-of-view. The PSF is determined by the field-of-view of the instrument, its optical design, and the time response of the thermistor- bolometer and the associated signal-conditioning electronics. The field-of-view is limited by an elongated hexagonal aperture in the field stop. The PSF has been measured in the laboratory; however, the finite solid angle of the beam used for measurement of the PSF complicates the interpretation of these measurements. This paper discusses the estimation of the PSF of the CERES instruments based on the effects of the time response, the finite solid angle of the beam used in the laboratory calibration, and the experimental output of the instrument. The paper compares the actual instrument output with the predicted results based on a finite solid angle uniform source.

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Jack Paden, G. Louis Smith, Robert Benjamin Lee III, Dhirendra K. Pandey, and Susan Thomas "Reality check: a point response function (PRF) comparison of theory to measurements for the clouds and the Earth's radiant energy system (CERES) tropical rainfall measuring mission (TRMM) instrument", Proc. SPIE 3074, Visual Information Processing VI, (22 July 1997); https://doi.org/10.1117/12.280612

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