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ARPA Taurus

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Taurus Taurus - COSPAR 1994-017

Status: Retired 1998. First Launch: 1994-03-13. Last Launch: 1998-10-03. Number: 2 . Payload: 1,320 kg (2,910 lb). Thrust: 1,711.00 kN (384,648 lbf). Gross mass: 73,000 kg (160,000 lb). Height: 27.90 m (91.50 ft). Diameter: 2.35 m (7.70 ft). Apogee: 1,000 km (600 mi).

LEO Payload: 1,320 kg (2,910 lb).

• USA 101 - . Payload: STEP-0 / STEP M0. Mass: 502 kg (1,106 lb). Nation: USA. Agency: USAF. Program: STEP. Class: Military. Type: Strategic defense satellite. Spacecraft: TAOS. USAF Sat Cat: 23030 . COSPAR: 1994-017A. Apogee: 561 km (348 mi). Perigee: 555 km (344 mi). Inclination: 105.00 deg. Period: 95.80 min. Space Test Experiment Program; 10 satellite subsystem experiments. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

• USA 102 - . Payload: DarpaSat. Mass: 203 kg (447 lb). Nation: USA. Agency: DARPA. Class: Technology. Type: Navigation technology satellite. Spacecraft: DARPASAT. USAF Sat Cat: 23031 . COSPAR: 1994-017B. Apogee: 556 km (345 mi). Perigee: 532 km (330 mi). Inclination: 105.00 deg. Period: 95.50 min. GPS receiver and data processor technology tests. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B)..

• STEX - . Payload: STEX. Nation: USA. Agency: NRO. Manufacturer: NRL. Class: Technology. Type: Ion engine technology satellite. Spacecraft: STEX. USAF Sat Cat: 25489 . COSPAR: 1998-055A. Apogee: 759 km (472 mi). Perigee: 744 km (462 mi). Inclination: 84.99 deg. Period: 99.77 min.

  Tested TAL-D55 plasma engine and was to be part of the NRO's ATex tether experiment. The ATeX lower end mass was meant to remain attached to the STEX parent spacecraft, but with only 21 m of tether deployed, it appeared the tether was so far off vertical that automatic safety systems jettisoned the base to protect the remainder of the STEX satellite. Thus, the upper and lower ATeX end masses were in orbit as one object connected by a 21 m tether, and designated USA 141 (1998-055C). The main STEX satellite was in orbit as a separate object, 1998-055A.

• USA 141 - . Payload: ATEX. Mass: 54 kg (119 lb). Nation: USA. Agency: NRL, NRO. Class: Technology. Type: Tether technology satellite. Spacecraft: TiPS. USAF Sat Cat: 25615 . COSPAR: 1998-055C. Apogee: 766 km (476 mi). Perigee: 750 km (466 mi). Inclination: 84.99 deg. Period: 99.90 min.

  NRO's ATeX (Advanced Tether eXperiment) reportedly failed on January 16. The ATeX lower end mass was meant to remain attached to the STEX parent spacecraft, but with only 21 m of tether deployed, it appeared the tether was so far off vertical that automatic safety systems jettisoned the base to protect the remainder of the STEX satellite. Thus, the upper and lower ATeX end masses were in orbit as one object connected by a 21 m tether, and designated USA 141 (1998-055C). The main STEX satellite was in orbit as a separate object, 1998-055A.