Space craft engaged in investigation of spaceflight techniques and technology.

Typical orbit: 803 km x 819 km at 99 degrees inclination. Mass: 130 kg (280 lb). Associated Launch Vehicle: Thor Agena D.

• 1964 January 19 - OPS 3367A - Launch Site: Vandenberg. Launch Vehicle: Thor Agena D. Mass: 130 kg (280 lb). Perigee: 789 km (490 mi). Apogee: 810 km (500 mi). Inclination: 99.00 deg. Period: 100.90 min.

  Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

• 1964 January 19 - OPS 3367B - Launch Site: Vandenberg. Launch Vehicle: Thor Agena D. Mass: 130 kg (280 lb). Perigee: 791 km (491 mi). Apogee: 815 km (506 mi). Inclination: 99.00 deg. Period: 100.90 min.

  Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

• 1964 June 18 - OPS 4467B - Launch Site: Vandenberg. Launch Vehicle: Thor Agena D. Mass: 130 kg (280 lb). Perigee: 814 km (505 mi). Apogee: 822 km (510 mi). Inclination: 99.80 deg. Period: 101.30 min.

• 1964 June 18 - OPS 4467A - Launch Site: Vandenberg. Launch Vehicle: Thor Agena D. Mass: 130 kg (280 lb). Perigee: 812 km (504 mi). Apogee: 820 km (500 mi). Inclination: 99.80 deg. Period: 101.20 min.

  Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

• JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Accessed at: http://msl.jpl.nasa.gov/home.html.

• USAF Satellite Database, USAF Institute of Technology, 1995. Accessed at: ftp://archive.afit.af.mil/pub/space/.

• McDowell, Jonathan, Jonathan's Space Home Page, Harvard University, 1997-present. Jonathan McDowell's complete on-line listing of all objects orbited and over 20,000 rocket launches Accessed at: http://www.planet4589.org/jsr.html.

• Krebs, Gunter, Gunter's Space Page, University of Frankfurt, 1996. Accessed at: http://www.skyrocket.de/space.