Optimized Planning of GPS-Based

Franz Josef Lohmar

Abstract:	Today the most severe handicap still hampering satellite-based surveying in practice is the problem of restricted satellite visibilities due to signal shading, especially in wooded and urban environments. The conventional de-termination of observation windows for critical points is time-consuming and thus expensive in relation to the sat-ellite measurements itself. Consequently the obstruction problem has not been handled in a professional way up to now. With the availability of CCD sensors it is possible to de-tect obstructions automatically and to determine observa-tion windows in real-time. This is why this technique al-lows a rigorous optimization of field work especially in horizontal-control networks. The present paper describes the method employed and the status of the development of a device for this purpose as well as of supplementary planning software, which is under way at the Bochum University of Applied Sciences.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	85 - 90
Cite this article:	Lohmar, Franz Josef, "Optimized Planning of GPS-Based," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 85-90.
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