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Proceedings Paper

Dynamic electrothermal model of the ERBE nonscanning channels
Author(s): Martial P.A. Haeffelin; J. Robert Mahan; Robert Benjamin Lee; Robert J. Keynton
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Paper Abstract

The Earth Radiation Budget Experiment (ERBE) consists of three satellites, each carrying a set of three scanning and four nonscanning Earth-viewing radiometric channels. These instruments are used to monitor the components of the Earth's radiative energy budget, which include reflected solar radiation and Earth-emitted radiation. The current paper deals with high-order modeling of the nonscanning channels. The nonscanning instruments are active cavity radiometers which view the Earth with two fields of view, medium and wide, and in two wavelength intervals, visible (0.2 to 5.0 micrometers ) and total (0.2 to 50.0 micrometers ). The visible channels are equipped with a hemispherical fused silica filter dome which absorbs long wave radiation. The optical front-end of the nonscanning instruments, including the field-of- view limiter and the filter dome for the visible channels, is modeled using the Monte-Carlo ray-trace method. Work in progress includes a finite difference thermal diffusion model of the filter dome. When completed, this model will be integrated with an existing dynamic electrothermal model of the total channel. This will permit studies of the contamination of the cavity signal due to emission and scattering of radiation from the field-of-view limiter and filter dome. Reported are results for the optical and thermal radiative behavior of the optical front-end of the ERBE WFOV total and visible channels.

Paper Details

Date Published: 15 September 1993
PDF: 10 pages
Proc. SPIE 1934, Passive Infrared Remote Sensing of Clouds and the Atmosphere, (15 September 1993); doi: 10.1117/12.154899
Show Author Affiliations
Martial P.A. Haeffelin, Virginia Polytechnic Institute and State Univ. (United States)
J. Robert Mahan, Virginia Polytechnic Institute and State Univ. (United States)
Robert Benjamin Lee, NASA Langley Research Ctr. (United States)
Robert J. Keynton, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 1934:
Passive Infrared Remote Sensing of Clouds and the Atmosphere
David K. Lynch, Editor(s)

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