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ELF/VLF Receivers

NSSDCA ID: 1974-040A-03

Mission Name: Hawkeye 1
Principal Investigator:Prof. Donald A. Gurnett


This experiment measured electric and magnetic fields using a 42.7-m electric dipole (tip-to-tip) and a search coil antenna deployed 1.58 m from the spacecraft. The electric field spectrum measurements were made in 16 logarithmically spaced frequency channels extending from 1.78 Hz to 178 kHz, and dc electric fields were also measured. The bandwidth of these channels varied from 7.5% to 30% depending on center frequency. Channel sensitivity and dynamic range were 1E-6 V/m and 100 dB, respectively. A wideband receiver was also used, with two selectable bandwidth ranges: 0.15 to 10 kHz or 1 to 45 kHz. The magnetic field spectrum was measured in eight discrete, logarithmically spaced channels from 1.78 Hz to 5.62 kHz. The bandwidth of these channels varied from 7.5% to 30% depending on frequency. The dynamic range was 100 dB, and the sensitivity ranged from 0.1 nT at 1.78 Hz to 3.4E-4 nT at 5.62 kHz. The wideband receiver described above could be used with the magnetic antenna. Each discrete channel was sampled once every 11.52 s. Data are available from the PI.

Alternate Names

  • Hawkeye1/ELF/VLFReceivers

Funding Agency

  • NASA-Office of Space Science Applications (United States)


  • Space Physics: Magnetospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. James L. Green



NameRoleOriginal AffiliationE-mail
Mr. G. W. PfeifferOther InvestigatorUniversity of Iowa
Prof. Donald A. GurnettPrincipal InvestigatorUniversity of Iowa
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