The Method of Ratios
Abstract
This paper presents a detailed algorithm to compute a mean visibility report between a range-restricted ground station and a space object, generated by the method of ratios. This method is based upon the limiting orbital characteristics of a space object versus a ground station, which are used to generate a visibility report from an analytical model. For this study, the visibility report is defined as the mean minutes-per-day the space object is above the site's horizon and within sensor range. The computer simulation models orbital motion using first order secular perturbations caused by mass anomalies. The method of ratios reduces computation time by over 97% when the results are compared to a visibility truth table created using the satellite rise-set algorithm developed by Alfano et al. This method can also be used to evaluate all objects in a space catalogue against a network of range-restricted ground stations. Operations personnel can then use this master visibility report to maintain a current database of all space objects visible to a particular ground station, which is central for space surveillance radar sensors to perform efficient tracking.... Mathematical models, Numerical methods and procedures, Models, Visual surveillance, Tracking, Visibility, Air-to-space, Earth (planet) observation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1992
- Accession Number
- ADA267279
Entities
People
- Daniel D. Wright Iii
- David Negron Jr.
- Salvatore Alfano
Organizations
- United States Air Force Academy