NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Geophysical Research Sat



This Cambridge Research Lab (CRL) Geophysical Research Satellite was a geophysics experiment test. It launched from Wallops Island on a Scout vehicle into a 411 x 1311 km altitude Earth orbit with an inclination of 49.7 degrees. The spacecraft was active for 13 orbits, approximately 22 hours.

The objective of the mission was to study the distribution, species, and charge of ambient particles and gases and to study the tissue-equivalent radiation dosage at these altitudes. The payload comprised retarding potential analyzers, mass spectrometer, tissue equivalent ionization chamber, and recycling tissue dosimeter.

Alternate Names

  • 00612
  • GRS
  • GeophysicalResearchSat

Facts in Brief

Launch Date: 1963-06-28
Launch Vehicle: Scout
Launch Site: Wallops Island, United States
Mass: 99.3 kg

Funding Agency

  • Department of Defense-Department of the Air Force (United States)


  • Space Physics

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

[] NASA Logo -