Design of generic telecommand executor for automatic spacecraft testing

Spacecraft Testing forms an integral part of spacecraft realization. The various subsystems of the spacecraft and its interfaces are evaluated through Integrated Spacecraft Tests. During these tests appropriate Telecommands are sent to the spacecraft. The decoding and execution of these commands are verified and confirmed against the expected behavior of various subsystems. Users send instructions using Checkout Command Language (CCL). Telecommands are generated from the CCL based on the project requirements. Total Automation for Spacecraft Checkout aims at providing an automatic test facility to carry out Spacecraft Testing. Based on satellite or project requirements Telecommand code pattern may vary from mission to mission. A Generic Telecommand Executor is developed for catering to Telecommand generation and execution for different projects. This paper brings out the design and implementation aspects of generic Telecommand Executor.