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Proceedings Paper

Camera guided ground based scanning lidar for contrail investigations: extrapolation of lidar measurements to CCD camera images and comparison with satellite data
Author(s): Frank Homburg; Volker Freudenthaler; Horst Jaeger
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Paper Abstract

A ground-based lidar system with an accurate scanning capability has been built up for detailed investigations of jet airplane condensation trails. The scanning of contrails including their small scale structures requires a complex and fast system control In particular the positioning of the scanning mount is time critical. A CCD camera is therefore integrated with the lidar system for the definitive capture of the target. The whole system is controlled by a software package, which has been developed with the PC based operating system Microsoft Windows. By this means a complete contrail scan can be performed within 20 to 30 sec, which is fast enough to investigate contrails even in the vortex regime. The combination of lidar measurements of a contrail cross section with data acquired simultaneously by the CCD camera allows the determination of the spatial spread of contrails and to extrapolate the optical depth determined by lidar within the 40 degree viewing angle of the CCD camera. This technique will be used to validate and possibly improve existing algorithm which determine contrails in AVHRR satellite images.

Paper Details

Date Published: 31 October 1997
PDF: 7 pages
Proc. SPIE 3127, Application of Lidar to Current Atmospheric Topics II, (31 October 1997); doi: 10.1117/12.279077
Show Author Affiliations
Frank Homburg, Fraunhofer-Institut fuer Atmosphaerische Umweltforschung (Germany)
Volker Freudenthaler, Fraunhofer-Institut fuer Atmosphaerische Umweltforschung (Germany)
Horst Jaeger, Fraunhofer-Institut fuer Atmosphaerische Umweltforschung (Germany)

Published in SPIE Proceedings Vol. 3127:
Application of Lidar to Current Atmospheric Topics II
Arthur J. Sedlacek III; Kenneth W. Fischer, Editor(s)

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