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VLF (1-32 kHz) Wave-Particle Interactions in the Magnetosphere

NSSDCA ID: 1977-102A-13

Mission Name: ISEE 1
Principal Investigator:Prof. Robert A. Helliwell


This experiment was intended to provide data to study interactions between discrete VLF waves and energetic particles in the magnetosphere. The VLF waves were produced by a ground-based transmitter. Injection of the waves beyond the ionosphere was assured by transmitter location in a region where the magnetic lines of force are open: in this case, the Siple station, Antarctica. The injected signal and any stimulated VLF emissions were recorded through a loop antenna by a 1- to 32-kHz broadband receiver on the satellite. The observed parameters were the intensities of received radio frequency waves as a function of time.

Alternate Names

  • ISEE1/VLF_1-32kHz_Wave-ParticleInteractionsintheMagnetosphere

Facts in Brief

Mass: 1.3 kg
Power (avg): 1 W

Funding Agency

  • NASA-Office of Space Science (United States)


  • Space Physics: Magnetospheric Studies
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. H. Kent Hills



NameRoleOriginal AffiliationE-mail
Dr. Timothy F. BellOther InvestigatorStanford
Prof. Robert A. HelliwellPrincipal InvestigatorStanford

Selected References

  • Bell, T. F., and R. A. Helliwell, The Stanford University VLF wave injection experiment on the ISEE-A spacecraft, IEEE Trans. Geosci. Electron., GE-16, No. 3, 248-252, doi:10.1109/TGE.1978.294556, July 1978.
  • Bell, T. F., et al., Nonducted coherent VLF waves and associated triggered emissions observed on the ISEE-1 satellite, J. Geophys. Res., 86, No. A6, 4649-4670, doi:10.1029/JA086iA06p04649, June 1981.
  • Sonwalkar, V. S., et al., Direct multiple path magnetospheric propagation: A fundamental property of nonducted VLF waves, J. Geophys. Res., 89, No. A5, 2823-2830, doi:10.1029/JA089iA05p02823, May 1984.
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