Probability Estimates of Cloud-Obscured Line-of-Sight
Scientific rept. no. 2
SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
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The purpose of this study is to explore the basic relationships between the climatic frequency distribution of sky cover and the frequency and duration of Cloudy-Lines-of-Sight CLOS from one or more ground sites to points in space. Through a series of model calculations, estimates are made of the incremental changes in CLOS persistence and recurrence that correspond to changes in the climatic frequency of overcast, broken, scattered and clear sky conditions. The determination of CLOS recurrence and persistence probability were made using the bivariate normal distribution. The analytical stochastic model is based upon the Ornstein-Uhlenbeck class of the simple Markov process. A discussion of the procedures for modeling CLOS behavior is given in a previous report. Model results are presented for CLOS as a function of sky cover and path sight, CLOS recurrence and persistence probability relative to fixed categories of sky cover, and both single and multiple site CLOS recurrence and persistence probability relative to fixed categories of sky cover, and both single and multiple site CLOS recurrence and persistence probabilities.
- Optical Detection and Detectors