Interplanetary Telemetering

The use of telemetry systems over interplanetary distances generates performance requirements more severe than ever before experienced. Full exploitation of the foreseeable state-of-the-art and high over-all operational efficiencies will be essential in fulfilling the requirements of these rigorous standards of performance. The problem areas associated with interplanetary telemetry and an approach to the selection of system operating parameters are discussed. The analysis is based on the dividing of operational efficiency into two categories: information efficiency and physical system efficiency. The performance of a typical interplanetary system is analyzed to exemplify the importance of a number of the operating parameters which affect system performance.