All-sky infrared cloud clutter analysis

Piet B. W. Schwering; A. C. Kruseman

doi:10.1117/12.151053

13 August 1993 All-sky infrared cloud clutter analysis

Piet B. W. Schwering, A. C. Kruseman

Proceedings Volume 1967, Characterization, Propagation, and Simulation of Sources and Backgrounds III; (1993) https://doi.org/10.1117/12.151053
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

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.

Citation Download Citation

Piet B. W. Schwering and A. C. Kruseman "All-sky infrared cloud clutter analysis", Proc. SPIE 1967, Characterization, Propagation, and Simulation of Sources and Backgrounds III, (13 August 1993); https://doi.org/10.1117/12.151053

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