FAA communications cost model program documentation: Revised

The FAA Communications Cost Model is a computer program designed to answer management questions dealing with long-term, national-level communications planning issues. Therefore, the program is purposely directed toward estimating long-term macro-level (as opposed to near-term, micro-level) communications costs. The algorithms used emphasize cause-and-effect relationships (rather than direct extrapolation of cost data) to predict costs. This report documents the communications model computer program. It includes a description of model equations, functional flow charts, and the program listings. It should be used in conjunction with the revised FAA Communications Model User's Guide for a comprehensive understanding of the computer software. The edition supersedes the issue dated May 1979.