Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

ETS (Engineering Test Satellite)





Artist conceotion of ETS-8 in orbit
Artist's concept of ETS-8 in orbit
Satellites launched by the Japan's NASDA (National Space Development Agency) to demonstrate new spacecraft techniques and test new equipment and launch vehicles. They are also known by the national name Kiku ("chrysanthemum").

ETS-7 consisted of two spacecraft – a chase satellite (Hikoboshi) and a target satellite (Orihime) – which carried out experiments in remote-controlled rendezvous-docking and space robotics. ETS-8, scheduled for launch in 2006, will be the world's largest satellite in geostationary orbit. Among other things, it will test multimedia broadcast systems and carry a high-accuracy atomic clock to test its positioning systems using GPS (Global Positioning System) data.


spacecraft launch date launch vehicle launch site orbit mass (kg)
ETS-1 Sep. 9, 1975 N-1 Tanegashima 975 × 1,103 km × 47° 85
ETS-2 Feb. 23, 1977 N-1 Tanegashima 35,854 × 35,860 km × 12° 130
ETS-3 Feb. 11, 1981 N-2 Tanegashima 240 × 20,680 km × 28° 640
ETS-4 Sep. 3, 1982 N-1 Tanegashima 966 × 1,226 km × 45° 385
ETS-5 Aug. 27, 1987 H-1 Tanegashima 35,770 × 35,805 km × 2° 550
ETS-6 Aug. 28, 1994 H-2 Tanegashima failed to reach GSO 3,800
ETS-7 Nov. 28, 1997 H-2 Tanegashima 550 km × 35° 2,860


Related categories

   • JAPANESE SPACECRAFT
   • SATELLITES AND SPACE PROBES
   • JAPAN IN SPACE