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VLF-ELF Receiver

NSSDCA ID: 1971-109A-03

Mission Name: Ariel 4
Principal Investigator:Prof. Thomas R. Kaiser


Seven low-noise band-pass amplifiers (channels) were used to measure very low frequency (VLF) propagation. Three channels, each of 1 kHz bandwidth, were centered on 3.2, 9.6, and 16 kHz. Another channel centered on 16 kHz with a 100 Hz bandwidth was used to study the continuous wave signal strength from the Rugby transmitter in Great Britain. Two channels were centered on 0.75 and 1.25 kHz, each with a bandwidth of 0.50 kHz. A seventh channel at 17.8 kHz (minimum reading) was included for transmissions from the NAA station (Maine). On some channels, peak, mean, and minimum signals were measured in successive 28-s sampling intervals. A multi-turn receiving antenna was included.

Alternate Names

  • Ariel4/VLF-ELFReceiver
  • VLF Measurements


  • 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
Prof. Thomas R. KaiserPrincipal InvestigatorUniversity of Sheffield
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