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Class: Earth. Type: Ionosphere. Destination: Medium Earth Orbit. Nation: USA. Agency: NASA. Early technology satellite. None reached orbit. Typical orbit: 1041 km circular orbit, 60.4 deg inclination. Mass: 56 kg (123 lb).
Beacon Chronology - 1964 October 10 - Explorer 22 - Program: Explorer. Launch Site: Vandenberg. Launch Complex: SLC5. Launch Vehicle: Scout. Mass: 52 kg (114 lb). Perigee: 872 km (541 mi). Apogee: 1,053 km (654 mi). Inclination: 79.70 deg. Period: 104.30 min.
Ionospheric and geodetic data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space.
- 1965 April 29 - Explorer 27 - Program: Explorer. Launch Site: Wallops Island. Launch Complex: LA3A. Launch Vehicle: Scout. Mass: 60 kg (132 lb). Perigee: 932 km (579 mi). Apogee: 1,309 km (813 mi). Inclination: 41.20 deg. Period: 107.70 min.
Battery failed in 1968; ionospheric research and geodetic data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space.
Bibliography:- McDowell, Jonathan, Jonathan's Space Home Page (launch records), Harvard University, 1997-present. Web Address when accessed: http://www.planet4589.org/jsr.html.
- JPL Mission and Spacecraft Library, Jet Propulsion Laboratory, 1997. Web Address when accessed: http://msl.jpl.nasa.gov/home.html.
- McDowell, Jonathan, Launch Log, October 1998. Web Address when accessed: http://hea-www.harvard.edu/~jcm/space/log/launch.html.
- NASA Report, Early Electrostatic Probe Results From Explorer Xxii, Web Address when accessed: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19660012932_1966012932.pdf.
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© Mark Wade, 1997 - 2008 except where otherwise noted.
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