KAUR (satellite bus)

A vector diagram of the Luch satellite.

The KAUR (Russian: КАУР, Космический Аппарат Унифицированного Ряда, Universal Spacecraft Series) program was a series of satellite buses designed and manufactured by ISS Reshetnev (then NPO PM). Its design is based on a pressurized bus originally developed in the 1960s and has been used from low Earth Orbit to medium Earth orbit and even to GEO. It has four different generations and its different versions have been used from civilian communications to satellite navigation.