Accession Number:

AD0266961

Title:

AN APPROACH TO LINE-OF-SIGHT PROBLEMS IN SURVEILLANCE-EQUIPMENT SPECIFICATION AND EVALUATION

Descriptive Note:

Corporate Author:

MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s):

Report Date:

1961-11-01

Pagination or Media Count:

1.0

Abstract:

A generalization is developed that is useful in evaluating the effect of elevating a sensory device to improve the line-of-sight coverage. In a terrain having valleys of varying depth and hilltops all the same height, the fraction of a valley that is not in defilade tends to be proportional to the height of the vantage point and to the width of th valley. It is inversely pr porio l to e r ge of the valley and to the depth of the valley. If the height times the width, divided by the range and the depth gives a number equal to or greater than four, substantially the whole of the valley can be seen. For terrains of this class characterized by random variation in the width-to-depth ratio, a simple dependence on this same number results, if the average width-to-depth ratio is used. There is also dependence on a second number which represents how consistent the roughness of the errain is. The development was extended to determine the area visible to airborne sidelooking and to all-around-looking surveillance devices as a function of their heights. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE