I.B. + M.A. DE LANDE LONG
SOFTWARE + CONSULTANCY

Telecommand Encoder Shell

The Telecommand Encoder Shell package has more than 10 years of operational applications. It is a commercial off-the-shelf (COTS) software component which implements the ground based parts of a telecommand system, including the TC Space Data Link Protocol and the Communications Operation Procedure (COP-1).

It gives access through an API (Application Programming Interface) to the telecommand facilities using calls in ANSI-C. It is highly portable and easy to use for building into different kinds of spacecraft control systems.

TC Encoder Shell ground system application

The Telecommand Encoder Shell accepts packets and the other SDUs (service data units) defined for the TC Space Data Link Protocol. It delivers Communications Link Transmission Units (CLTUs) ready for serialisation and transmission. The Shell also accepts the Communications Link Control Words (CLCWs) which form the return part of the telecommand COP-1 protocol. CLCWs are extracted from the spacecraft telemetry.

The Shell provides support for ESA Telecommand Authentication as an optional extra. When this option is selected, the Shell adds the authentication tail to telecommand segments.

The facilities and interfaces of the Telecommand Encoder Shell package are described further in the detailed description.

Please contact us for further information on technical questions or licensing conditions for the Telecommand Encoder Shell package.

Detailed Description TC Features Operational Applications