Abstract : This report documents the development of numerous elementary cloud cover models and evaluates the capability of each comparison with actual data. The data are measurements of apparent cloud cover as a function of view angle obtained from space shuttle cloud photographs. Using these data a physically realistic model for cumuliform cloud fields is obtained. The model permits the determination of actual cloud cover from a single-layer totally opaque clouds considered in this research. Additionally, the model is used to specify the probabilities are compared with similar ones obtained from other models of cloud-free line-of-sight commonly in use.