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This paper discusses the use of delay-lock radar techniques for deep-space tracking and communications tasks. To illustrate these techniques, a Mars or Venus space probe of the Voyager type is used as a typical mission. The Voyager is an unmanned vehicle in the 6000-lb class which is planned for scientific and exploratory purposes from the years 1967 to 1975. A brief introduction to the results of delay-lock radar development to date is given, followed by a description of the digital delay-lock discriminator. A discussion is then given on the problems inherent in the modulation and demodulation which is required to make full use of the delay-lock capability. An integrated delay-lock two-way tracking-communications system suitable for the assumed mission is then described and the performance to be expected is calculated. This anticipated performance indicates considerable improvement over present capabilities.
Space Electronics and Telemetry, IEEE Transactions on (Volume:10 , Issue: 2 )
Date of Publication: June 1964