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NSSDCA ID: 1959-009A-05

Mission Name: Explorer 7
Principal Investigator:Mr. Herman E. Lagow


Three photoconducting cadmium sulfide cells were used to measure micrometeorite penetration and molecular sputtering. The three cells were identical in design and effective area (18 sq mm) and were mounted on a magnesium plate on the satellite's equator facing outward perpendicular to the satellite's spin axis. The experiment was exposed to the space environment of micrometeorites, trapped radiation, and sputtering for 38 days of active life. The three cells and a thermistor that was included as part of the experiment performed normally. One cell was penetrated on the 16th day by a particle approximately 10 microns in diameter.

Alternate Names

  • Explorer7/Micrometeorite


  • Planetary Science: Small Bodies

Additional Information

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



NameRoleOriginal AffiliationE-mail
Mr. Herman E. LagowPrincipal InvestigatorNASA Goddard Space Flight Center
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