Apparatus and method for executing telecommand on geostationary satellite, and apparatus and method for verifying telecommand execution status on geostationary satellite ground control system

An apparatus for verifying telecommand execution on a satellite ground control system, the apparatus comprising:

• a telecommand transmitter transmitting a telecommand signal to a satellite;
• a telecommand image database (DB) storing detail information on the transmitted telecommand as an image;
• a telecommand verifier DB watching and storing telemetry data with the telecommand;
• a telecommand receiver receiving a telemetry transfer frame generated by executing the telecommand from the satellite and extracting command execution verification words from the received telemetry transfer frame;
• a telecommand execution verifier extracting telecommand execution information from the command execution verification words, inquiring related telecommand detail information from the telecommand image DB based on the telecommand execution information, inquiring telemetry data matching with the telecommand from the telecommand verifier DB based on the telecommand execution information, and extracting a measurement value of the inquired telemetry data from the telemetry transfer frame;
• and
• a knowledge-base system determining based on the telecommand detail information and the measurement value of the telemetry data whether the measurement value of the telemetry data is normal so that the telecommand execution verifier determines whether the telecommand has been normally performed.

A method of executing a telecommand on a satellite, the method comprising:

• receiving a telecommand signal from a satellite ground control system and extracting a telecommand transfer frame from the received telecommand signal;
• determining validity of the extracted telecommand transfer frame;
• executing a telecommand of a valid telecommand transfer frame;
• generating command execution verification words containing execution information of the executed telecommand and generating a telemetry transfer frame containing the command execution verification words and telemetry data;
• and
• transmitting the telemetry transfer frame to the satellite ground control system.

A method of verifying telecommand execution on a satellite ground control system, the method comprising:

• transmitting a telecommand signal to a satellite and storing detail information on the transmitted telecommand as an image;
• receiving a telemetry transfer frame generated by executing the telecommand from the satellite and extracting command execution verification words from the received telemetry transfer frame;
• extracting telecommand execution information from the command execution verification words;
• inquiring related telecommand detail information based on the telecommand execution information;
• inquiring telemetry data matching with the telecommand based on the telecommand execution information;
• extracting a measurement value of the inquired telemetry data from the telemetry transfer frame;
• determining based on the telecommand detail information and the measurement value of the telemetry data whether the measurement value of the telemetry data is normal;
• and
• determining based on a result of the determination whether the telecommand has been normally performed.