The Canadian Space Agency operates a highly active space program, conducting deep-space, planetary, and aviation research, and developing rockets and satellites. Canada was the third country to design and construct a satellite after the Soviet Union and the United States, with the 1962 Alouette 1 launch. Canada is a participant in the International Space Station (ISS), and is a pioneer in space robotics, having constructed the Canadarm, Canadarm2 and Dextre robotic manipulators for the ISS and NASA's Space Shuttle. Since the 1960s, Canada's aerospace industry has designed and built numerous marques of satellite, including Radarsat-1 and 2, ISIS and MOST. Canada has also produced one of the world's most successful and widely used sounding rockets, the Black Brant; over 1,000 Black Brants have been launched since the rocket's introduction in 1961.