Design, development and evolution of the guidance, navigation and control system for the Russian segment of the International Space Station

The paper discusses design concepts for Guidance, Navigation and Control (GNC) system for the International Space Station (ISS), which consists of two systems: one Russian and one American. The paper describes the tasks addressed by each of the GNC systems, the overall architecture of the ISS GNC system, exchange of data and commands between the Russian Segment GNC system and the US Orbital Segment GNC system. Through the example of the ISS attitude control using jet propulsion and desaturation of the angular momentum accumulated in US Control Moment Gyroscopes the paper reviews modification of the angular motion control algorithms in the course of the ISS mission.