BS Z 12:1998

1 Introduction
    1.1 Purpose and scope
    1.2 Applicability
    1.3 Bit numbering convention and nomenclature
    1.4 References
2 Telecommand channel service overview
3 Coding layer: Standard data structures and procedures
    3.1 Overview of the coding layer
    3.2 Standard data structures within the coding layer
    3.3 Standard procedures within the coding layer
4 Physical layer: standard data structures and procedures
    4.1 Overview of the physical layer
    4.2 Standard data structures within the layer
    4.3 Standard procedures within the layer
Annex A Channel service acronyms and terminology
Annex B Channel service specification
Figure
2-1 Telecommand system
3-1 Telecommand codeblock format
3-2 Components of the CLTU
3-3 Bit Transition Generator Logic Diagram
3-4 (63,56) Modified BCH code generator
3-5 TC Channel service state diagram (receiving end)
4-1 Sequence of CMMs comprising PLOP-1
4-2 Sequence of CMMs comprising PLOP-2
B-1 TC Channel Service Model
B-2 Sequence of Functions
Table
3-1 TC channel service states (receiving end)
3-2 TC channel service events (Receiving end)
4-1 Carrier modulation modes
B-1 Processing of CLTU elements
B-2 Recommended strategies

Defines the common requirements specifying the systems architecture of a spacecraft telecommand channel service. Intended for provision of a common framework within which space agencies may implement compatible future spacecraft telecommanding systems.