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Proceedings Paper

Development of new shipborne aureolemeter to measure the intensities of direct and scattered solar radiation on rolling and pitching vessel
Author(s): Hiroshi Kobayashi; Masataka Shiobara
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Paper Abstract

New shipborne aureolemeter was developed to improve the sun-tracking performance for accurate measurements of not only direct but also circumsolar radiation, even on a vessel weltering. Sun position is determined by a real-time image processing system with a CCD camera. The accuracy of the sun position determination is finer than 0.01°. The radiometer is tracked the sun under a feedback control with the derived sun position. For a sky radiance distribution measurement, the control target position on the CCD camera image is shifted a pixel corresponding to a measuring scattering angle. In the case of a scattering angle larger than 7°, the radiometer’s tracking is conducted under feed forward control on the basis of the angle of roll and pitch monitored with a gyroscope. The instrument constants were determined from a Langley plot method. Test observation was conducted onboard the Antarctic research vessel (R/V) Shirase during the 56th Japanese Antarctic Research Expedition (JARE-56; 2014-2015). Aerosol optical thickness (AOT) was measured. The measurement of the sky radiance distribution is being analyzed to derive the aerosol optical properties.

Paper Details

Date Published: 16 October 2015
PDF: 9 pages
Proc. SPIE 9640, Remote Sensing of Clouds and the Atmosphere XX, 96401A (16 October 2015); doi: 10.1117/12.2195691
Show Author Affiliations
Hiroshi Kobayashi, Univ. of Yamanashi (Japan)
Masataka Shiobara, National Institute of Polar Research (Japan)

Published in SPIE Proceedings Vol. 9640:
Remote Sensing of Clouds and the Atmosphere XX
Adolfo Comerón; Evgueni I. Kassianov; Klaus Schäfer, Editor(s)

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