Radiation, micrometeoroid data.

Typical orbit: 512 km x 3413 km at 33 degrees inclination. Associated Launch Vehicle: Vanguard.

• 1959 April 14 - Vanguard 3A - Program: Vanguard. Launch Site: Cape Canaveral. Launch Vehicle: Vanguard. FAILURE: Stage 2 damaged at seperation. Mass: 10 kg (22 lb). Apogee: 100 km (60 mi).

• 1959 April 14 - 30-inch Sphere - Program: Vanguard. Launch Site: Cape Canaveral. Launch Vehicle: Vanguard. FAILURE: Failure. Apogee: 100 km (60 mi).

• 1959 June 22 - Vanguard 3B - Program: Vanguard. Launch Site: Cape Canaveral. Launch Vehicle: Vanguard. FAILURE: Stage 2 propulsion malfunction. Mass: 10 kg (22 lb). Apogee: 140 km (80 mi).

• 1959 September 18 - Vanguard 3 - Program: Vanguard. Launch Site: Cape Canaveral. Launch Vehicle: Vanguard. Mass: 23 kg (50 lb). Perigee: 512 km (318 mi). Apogee: 3,413 km (2,120 mi). Inclination: 33.40 deg. Period: 126.40 min.

  Radiation, micrometeoroid data. Third stage failed to separate from payload. The TV-4BU burned-out third stage was left attached to the payload since the fiberglas case did not adversely affect the experiments.

• 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.

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

• Bramscher, Robert G, Spaceflight, "A Survey of Launch Vehicle Failures", 1980, Volume 22, page 351.

• McDowell, Jonathan, Launch Log, October 1998. Jonathan McDowell's complete on-line listing of all objects orbited since Sputnik. Accessed at: http://hea-www.harvard.edu/~jcm/space/log/launch.html.

• NASA Report, Geomagnetic Field Measurements by the Vanguard III Satellite , . Accessed at: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19620006987_1962006987.pdf. -right click to download pdfs!