They tell the flight operations team and subsystem engineers what is going on onboard the spacecraft. D. Thruster impulse level is .50 lb. Commands are sent from the Mission Operations Room up to the spacecraft. They are instructions that tell the spacecraft what to do, or set certain parameters onboard. Commands can be sent in real-time where they execute the moment the spacecraft receives them or they can be placed in the spacecraft s memory to be executed at a later time.
Some commands have several fields or more then one element that can be changed.