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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Performance prediction method for communications and tracking channels of Apollo unified S-band telecommunications and tracking system
Radio, telemetry, and command subsystems of Mariner IV telecommunication system
Spacecraft and ground equipment design for Lunar Orbiter telecommunication system
Telecommunication, electrical power and radar subsystem studies for Mars probe
Mariner Mars telecommunications system using PCM/PSK/PM modulation-demodulation in combination with pseudorandom sync codes
Radio, telemetry and command subsystems of Mariner Mars 1964 telecommunications system
Operation results of Mariner and Pioneer telecommunication systems, including system design and future capabilities
Interplanetary spacecraft telecommunications system design including block diagrams
Interplanetary medium and S-band telecommunications obtained from tracking data from Mariner II and Mariner IV spacecraft
Subsystem implementation and performance of on- board Surveyor telecommunications and command systems
Characteristics of split phase telecommunications link
Economic problems and estimated rate levels and structures for international telecommunications satellite systems
Surveyor telecommunications system from standpoint of actual subsystem implementation and performance, detailing reliability, flexibility, redundancy and data transmission modes
Spacecraft and ground equipment of Lunar Orbiter telecommunications system
We describe here strategies to meet the new telecommunications challenges.
This paper will describe the scientific objectives of the missions (Cassini's) and then show the designs of the telecommunications assemblies and systems that make this tremendous accomplishment possible.
SHARP (Spacecraft Health Automated Reasoning Program) is a knowledge-based system for the diagnosis of problems in NASA's Deep Space Network (DSN) telecommunications system. This system provides the means of communication between a spacecraft and operations personnel at Jet Propulsion Laboratory. SHARP analyzes problems that occur in both the on-board spacecraft telecom subsystem, and the DSN.
Propogation models that can be used for the design of Earth-space land mobile-satellite telecommunications systems are presented. These models include: empirical roadside shadowing, attenuation frequency scaling, fade and non-fade duration distribution, multipath in a mountain environment, and multipath in a roadside tree environment. Propogation data from helicopter-mobile and satellite-mobile measurements in Australia and the United States were used to develop the models.