RANDOM COMMUNICATION SATELLITE COVERAGE,
Abstract
The report develops models for assessing credible satellite failure rates, population densities, coverage probabilities, and outage intervals. These models are interpreted in terms of the present random military communication satellite system. A sufficient mutual field of view (about 90 degrees) of the synchronous equatorial orbit will provide a reasonable random coverage (0.97 to 0.99 probability) in the next 3 to 4 years, based on the past military communication satellite experience. For a smaller mutual field of view (about 45 degrees) a fair coverage (0.8 to 0.9) is obtained. Typical long-haul east-west station pairs have a mutual field of view of 45 to 70 degrees; typical intra-theater and north-south station pairs have a mutual field of 90 to 120 degrees. The average outage time will be approximately one-half day, essentially independent of the mutual field of view. Truncation of the satellite's life in 6 years has no significance on the system performance over the next 3 to 4 years and only enters into the calculation of the satellite's expected mean-time-to-failure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0825837
Entities
People
- C. S. Lorens
Organizations
- The Aerospace Corporation