Command and program control of the mission of the International Space Station Russian segment

In the course of carrying out a mission of a spacecraft (SC), its onboard systems need to be commanded from the ground. Traditionally, commands are sent from three sources: Mission control center, the onboard control system, the crew (for manned SC). This paper addresses the problems of command-and-program control of the mission of the Russian Segment of the International Space Station from the ground control system. The command and program control of a SC involves implementation of planned SC operations using command RF link and the SC onboard control system. Meant by operations in this case can be the combination of SC control actions «integrated through an overarching design and aimed at achieving a specific goal». In order to carry out a flight operation, a number of problems in command and program controlling need to be solved. This paper will mostly focus on the following problems: generating command and program data arrays for carrying out flight operations, verifying command and program data using a math model of the onboard control system.