Encyclopedia Astronautica
EOS

Electro-Optical Systems, Queanbeyan, NSW, Australia.

Location: Queanbeyan, NSW.

Associated Countries

Associated Spacecraft

Program 661A American ion engine technology satellite. Study 1961. In November of 1961, Electro-Optical Systems was awarded a contract by the U. S. Air Force to develop a 8.9 mN, cesium-contact ionization IPS for three sub-orbital flight tests. More...

Associated Engines

ATS 5 cm EOS electric/cesium rocket engine. 0.089 mN. Flown in 1968-1969. Isp=6700s. Thruster for the ATS-4 and ATS-5 tests; consisted of two contact ionization engines using cesium propellant. More...

ATS 8 cm EOS electric/cesium rocket engine. 4.5 mN. Flown in 1974. Isp=6700s.Thruster for the ATS-6 test; consisted of two electron bombardment engines using cesium propellant. The thruster anode diameter was 8 cm, and a cesiated tungsten neutralizer was used. More...

Program 661 EOS electric/cesium rocket engine. 8.9 mN. Flew 1962-1964. Isp=7400s. Cesium contact ion propulsion system used on three sub-orbital flight tests aboard Blue Scout Junior launch vehicles. More...

Snapshot EOS electric/cesium rocket engine. 8.5 mN. In Development, 1962-1964. Isp=5100s. Launched on Blue Scout Junior launch vehicle on Snapshot test; a contact ionization engine; thruster anode diameter was 5 cm. More...

See also

EOS Chronology

1998 July 10 - . 06:30 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC45/1. LV Family: Zenit. Launch Vehicle: Zenit-2.

WESTPAC - . Mass: 24 kg (52 lb). Nation: Australia. Agency: WPLTN. Manufacturer: RKA; EOS. Class: Earth. Type: Geodetic satellite. Spacecraft: GFZ-1. USAF Sat Cat: 25398 . COSPAR: 1998-043E. Apogee: 819 km (508 mi). Perigee: 815 km (506 mi). Inclination: 98.8000 deg. Period: 101.20 min. Formerly known as WPLTN-1, this geodesy satellite was a copy of Potsdam's GFZ-1 satellite, a sphere covered with laser retroreflectors, with a different `Fizeau' corner cube design. It serves as a target for the Western Pacific Laser Tracking Network (WPLTN) and is a joint project of Electro Optic Systems of Queanbeyan, New South Wales, Australia, and the Russian Space Agency. Diameter is 0.24m.