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VLF Receiver

NSSDCA ID: 1965-101A-01

Mission Name: FR 1
Principal Investigator:Dr. Llewelyn R. O. Storey


This experiment consisted of equipment to observe the field strength of the magnetic and electric fields at the satellite which resulted from transmissions of two VLF ground transmitters. The electric field intensity was observed with two dipoles and their corresponding receivers, and the magnetic field intensity was observed with three loop antennas and their corresponding receivers. The observations consisted of field strength recording vs time (location) in the regions over the ground transmitter and in the region conjugate to the ground transmitter. The experiment failed on August 26, 1968, after 30 months of operation. This far exceeded the 3-month planned lifetime. These five wide-dynamic-range (52dB), narrowband (160 Hz), VLF receivers received at frequencies of 16.8 kHz (St. Assise, France -FUB), or at 24.0 kHz (Balboa, Panama -NBA). For a more extensive experiment description see L. R. O. Storey, "Preliminary results on VLF propagation in the lower magnetosphere obtained by the FR 1 satellite," Space Research, n. 7, pp. 588-603, North Holland Pub. Co., Amsterdam, 1967.

Alternate Names

  • FR1/VLFReceiver

Facts in Brief

Power (avg): 2.7 W

Funding Agency

  • Centre National d'Etudes Spatiales (France)


  • Space Physics: Ionospheric Studies
  • Space Physics: Magnetospheric Studies

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. M. P. AubreyOther InvestigatorCentre National d'Etudes des Telecommunications
Dr. C. RenardOther InvestigatorUniversite de Bourges
Dr. Llewelyn R. O. StoreyPrincipal InvestigatorIonospheric Research
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