期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2000
卷号：XXXIII Part B7(/1-4)
页码：1349-1356
出版社：Copernicus Publications
摘要：A ground-based sky imager system consisting of two commercial digital CCD cameras with wide-angle lenses has been developed. The system can be used to derive various macroscopic cloud parameters: cloud amount, cloud-base heights and cloud-base wind (for every visible cloud layer). The method to calculate a DSM of the clo ud-base is presented. It includes the precise determination of the interior and exterior orientation of the cameras, which have been carried out with a close-range photogrammetric testfield, stars and special airplane flights (equipped with DGPS). The data acquisition took place in the Upper Rhine Valley, Switzerland in October 1999 and was part of the SOP (Special Observing Period) campaign of the programme MAP (Mesoscale Alpine Programme). Clo ud-base heights have been derived automatically using commercial digital photogrammetric systems and o wn software. A comparison of the results with other operational and MAP-only measurements/observations is shown. Finally, a case study of coincident ground- and satellite-based retrieval of cloud-base/cloud-top height for a vertically thin cirrus cloud formation is presented
