Тезис 

ISO 22671:2007 defines the communications link transmission unit (CLTU) service in conformance with the transfer services specified in ISO 15396:1998. The forward CLTU service is a space link extension (SLE) transfer service that enables a mission to send communications link transmission units (CLTUs) to a spacecraft.

ISO 22671:2007 defines, in an abstract manner, the forward CLTU service in terms of

  • the operations necessary to provide the transfer service;
  • the parameter data associated with each operation;
  • the behaviors that result from the invocation of each operation; and
  • the relationship between, and the valid sequence of, the operations and resulting behaviors.

It does not specify

  • individual implementations or products;
  • the implementation of entities or interfaces within real systems;
  • the methods or technologies required to radiate data to a spacecraft and to acquire telemetry frames from the signals received from that spacecraft for extraction of the Operational Control Field;
  • the methods or technologies required for communications; or
  • the management activities necessary to schedule, configure, and control the forward CLTU service.


Общая информация

  • Текущий статус :  Withdrawn
    Дата публикации : 2007-02
  • Версия : 2
    Число страниц : 149
  • :
    ISO/TC 20/SC 13
    Space data and information transfer systems
  • 49.140
    Space systems and operations

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