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Proceedings Paper

All-sky infrared cloud clutter analysis
Author(s): Piet B. W. Schwering; A. C. Kruseman
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Paper Abstract

An infrared all-sky mapper Scorpio has been developed at TNO-FEL. This system operates in the 3 - 5 micrometers and 8 - 13 micrometers wavelength bands. With its reflective optics system it scans a useful area of 340 degree(s) in azimuth and from -18 degree(s) up to +72 degree(s) in elevation with a resolution of 0.8 mrad. The system is calibrated during each revolution in an absolute way with the use of a temperature-controlled bar. The dynamic range is from -100 degree(s)C up to +300 degree(s)C. The mapper is used to obtain calibrated infrared images of the sky (primarily at 10 micrometers ) in an on-going study for statistical properties of the sky and cloud infrared radiation, i.e. infrared clutter and cloudiness. Scorpio is also useful for more general cloud and sky background studies. All-sky images are presented together with vertical profiles in empty and cloudy sky regions which are compared with Lowtran7 predictions of radiance, and meteorological cloud measurements. A description and analysis of the clutter analysis based on image cells is given. Images of RMS clutter are presented.

Paper Details

Date Published: 13 August 1993
PDF: 12 pages
Proc. SPIE 1967, Characterization, Propagation, and Simulation of Sources and Backgrounds III, (13 August 1993); doi: 10.1117/12.151053
Show Author Affiliations
Piet B. W. Schwering, TNO Physics and Electronics Lab. (Netherlands)
A. C. Kruseman, TNO Physics and Electronics Lab. (Netherlands)


Published in SPIE Proceedings Vol. 1967:
Characterization, Propagation, and Simulation of Sources and Backgrounds III
Wendell R. Watkins; Dieter Clement, Editor(s)

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