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| Titel |
Automatic cloud top height determination in mountainous areas using a cost-effective time-lapse camera system |
| VerfasserIn |
H. M. Schulz, S.-C. Chang, B. Thies, J. Bendix |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 12 ; Nr. 7, no. 12 (2014-12-05), S.4185-4201 |
| Datensatznummer |
250115979
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| Publikation (Nr.) |
 copernicus.org/amt-7-4185-2014.pdf |
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| Zusammenfassung |
| A new method is presented for the determination of cloud top heights using the footage of
a time-lapse camera that is placed above a frequently occurring cloud layer
in a mountain valley. Contact points between cloud tops and
underlying terrain are automatically detected in the camera image based on
differences in the brightness, texture and movement of cloudy and non-cloudy
areas. The height of the detected cloud top positions is determined by
comparison with a digital elevation model projected to the view of the
camera. The technique has been validated using data about the cloud immersion
of a second camera as well as via visual assessment. The validation shows a
high detection quality, especially regarding the requirements for the
validation of satellite cloud top retrieval algorithms. |
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