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VLF Receiver

NSSDCA ID: 1962-049A-03

Mission Name: Alouette 1
Principal Investigator:Dr. John S. Belrose


The purpose of the VLF experiment was to investigate the propagation characteristics of natural and manmade VLF signals. This experiment was a wideband high-gain receiver with a passband from 0.4 to 10 kHz using only the longest (45.7 m) sounder antenna. The receiver output, which sensed the electric field component of the signal strength, was maintained constant by means of an AGC loop. The standard VLF data form was a sonogram (graph) showing signals as a function of time and frequency. Whistlers and radio noise of various origins were observed in this region of radio frequencies. Performance had been nominal since launch, except for interference from the sounder which had not prevented observation of useful data. The sounder operation was most frequent, but a small percentage of observations were VLF only or both VLF and sounder.

Alternate Names

  • Alouette1/VLFReceiver

Funding Agency

  • Defence Research Board-Defence Research Telecommunications Establishme (Canada)


  • 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
Mr. Frank H. PalmerGeneral ContactDepartment of Communications/Communications Research Centre
Dr. H. G. JamesOther InvestigatorDepartment of Communications/Communications Research
Mr. Frank H. PalmerOther InvestigatorDepartment of Communications/Communications Research Centre
Dr. John S. BelrosePrincipal InvestigatorDepartment of Communications/Communications Research Centre
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