Start sequence a specific bit pattern at the

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Unformatted text preview: : A specific bit pattern at the beginning of a CLTU having a high autocorrelation function following an idle or acquisition sequence and which: a) synchronizes start of a CLTU; b) delimits start of first codeblock; and c) resolves the sense of a “1” and “0” in the CLTU, if necessary. SYMBOL: A bit in an encoded data stream. TAIL SEQUENCE: A specific data pattern which delimits the end of a CLTU. TC DATA: The data content (after decoding) of the CLTU which is outputted to the Data Routing Service (layer above) and which may include fill. CCSDS 201.0-B-3 Page A-5 June 2000 CCSDS RECOMMENDATION FOR TELECOMMAND: CHANNEL SERVICE TC TRANSFER FRAME: The protocol data unit of the Transfer layer. (See Reference [2], Data Routing Service.) TELECOMMAND: A generic term used to describe the process of telecommunicating commands to the spacecraft. TELECOMMAND CHANNEL SERVICE: A Telecommand Service which provides error-controlled communications across the space link. TELECOMMAND DATA ROUTING SERVICE: A Telecommand Service which provides error-controlled message communications between remote entities. CCSDS 2...
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