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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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Spacecraft telemetry and command

Probability distribution of time to first loss of lock investigated by second order phase-locked loop - spacecraft telemetry and command

PHASE LOCK↗

Command processors

Command decoders for processing satellite control data at ground station

DECODER↗

Study of Tools for Command and Telemetry Dictionaries

The Command and Telemetry Dictionary is at the heart of space missions. The C&T Dictionary represents all of the information that is exchanged between the various systems both in space and on the ground. Large amounts of ever-changing information has to be disseminated to all for the various systems and sub-systems throughout all phases of the mission. The typical approach of having each sub-system manage it's own information flow, results in a patchwork of methods within a mission. This leads to significant duplication of effort and potential errors. More centralized methods have been developed to manage this data flow. This presentation will compare two tools that have been developed for this purpose, CCDD and SCIMI that were designed to work with the Core Flight System (cFS).

Command Telemetry Dictionary C&↗