The CDF file contains approximately 22 second time resolution Electric and Magnetic field data, average magnetic field magnitude, and orbital position data from Hawkeye 1. The VLF experiment measured electric and magnetic fields using a 42.45-m electric dipole (tip-to-tip) which extended perpendicular to the spin axis 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.
Version:2.6.0
The CDF file contains approximately 22 second time resolution Electric and Magnetic field data, average magnetic field magnitude, and orbital position data from Hawkeye 1. The VLF experiment measured electric and magnetic fields using a 42.45-m electric dipole (tip-to-tip) which extended perpendicular to the spin axis 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.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Donald.A.Gurnett | |||
| 2. | MetadataContact | spase://SMWG/Person/Lee.Frost.Bargatze |
Hawkeye page maintained by NASA GSFC with science and instrument descriptions, data, software, and publication lists
Information about the ELF/VLF Receivers experiment on the Hawkeye 1 mission.
FTP access to repository of Hawkeye VLF data in CDF format at NASA CDAWeb.
In CDF via HTTP from SPDF
Repository of Hawkeye data in CDF format at NASA CDAWeb, accessible via web interface. Name of the data resource: HK_H0_VLF.
Web Service to this product using the HAPI interface.
Center Time of 22 sec averaging period
Magnetic Field Spectral Power Density at 8 Freq (2 - 5620 Hz): 1.78 Hz, 5.62 Hz, 17.8 Hz, 56.2 Hz, 178 Hz, 562 Hz, 1780 Hz, 5620 Hz
Electric Spectral Power Density at 16 Frequencies (2 Hz - 178 kHz): 1.80 Hz, 5.60 Hz, 17.8 Hz, 56.2 Hz, 178 Hz, 562 Hz, 1780 Hz, 5620 Hz, 13300 Hz, 17800 Hz, 23700 Hz, 31100 Hz, 42200 Hz, 56200 Hz, 100000 Hz, 178000 Hz
Average magnetic Field Magnitude
Hawkeye position in Earth radii, SM magnetic latitude, SM magnetic local time
Cartesian Position GSM
Active (=1) vs Passive (=0) Indicator. Active emissions only affect the Electric Field measurements at 17.8 Hz and 56.8 Hz
16 Electric Field assoc Frequencies (2Hz - 178kHz): 1.8 5.6 17.8 56.2 178.0 562.0 1780.0 5620.0 13300.0 17800.0 23700.0 31100.0 42200.0 56200.0 100000.0 178000.0
Electric Field associated Frequency band width (16 channels): 1.4 0.8 6.6 13.2 35.0 151.4 415.1 1178.0 439.0 493.5 778.5 581.0 779.5 1129.5 2464.5 2804.5
Electric Field associated Noise (16 channels)
8 Associated Magnetic Field Freq (1.78 - 5620 Hz): 1.78 5.62 17.8 56.2 178.0 562.0 1780.0 5620.0
8 Freq Band widths B field (1.565 - 1266 Hz): 1.565 0.96 6.64 12.04 36.565 154.9 517.0 1266.0
Noise associated with B field (8 - channels): 0.004425 4.853E-5 7.793E-7 5.72E-8 8.993E-9 8.854E-10 3.912E-10 3.784E-10