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NumericalData

ResourceID
spase://CSA/NumericalData/GO-ABOVE/VLF/L2/PT1M
ResourceHeader
ResourceName
ABOVE Level-2 Amplitude and Phase of VLF transmitter signals
ReleaseDate
2023-06-21 15:42:52
Description

Amplitude and phase for narrowband transmitters at
ABOVE sites. The Array for
Broadband Observations of VLF/ELF Emissions (ABOVE) Level-2 CDF
files of Amplitude, Phase and Bearing at 1 minute resolution for
seven VLF transmitters as observed from each station of the ABOVE
array.

The VLF transmitters observed are:

NDK (LaMoure, North Dakota, 46.37 N, 98.33 W, 25.2 kHz)

NAA (Cutler, Maine, 44.64 N, 67.29 W, 24.0 kHz),

NLK (Seattle, Washington, 48.20 N 121.92 W, 24.8 kHz)

NWC (Exmouth, Western Australia, 21.82 S, 114.16 E, 19.8 kHz)

NPM (Lualualei, Hawaii, 21.42 N, 158.15 W, 21.4 kHz)

NRK (Keflavik, Iceland, 63.85 N, 22.45 W, 37.5 kHz)

WWVB (Fort Collins, Colorado, 40.68 N, 105.05 W, 60 kHz)

GO-ABOVE is a ground‐based array of VLF radio receivers located across Canada and run as a part of the Canadian Space Agency's Geospace Observatory (GO). The ABOVE instruments are situated in two north‐south chains in Alberta and Manitoba, through the region roughly from L = 3 through L = 8. The ABOVE instruments monitor electromagnetic waves in a frequency range from 100 Hz to 75 kHz, covering chorus and hiss emissions as well as U.S. Navy transmitters near 25 kHz. The absolute timing accuracy is 10 ns, from GPS.

Acknowledgement
Please include the following in any publications using this data: Infrastructure funding for ABOVE is provided by the Canada Foundation for Innovation and the province of Alberta. ABOVE data used in this work was collected with the support of the Canadian Space Agency Geospace Observatory (GO Canada) contribution initiative.
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/C.M.Cully
2.MetadataContactspase://SMWG/Person/Leonard.N.Garcia
AccessInformation
RepositoryID
AccessURL
Name
GO-ABOVE CDFs for Athabasca (atha)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Athabasca, Alberta, Lat: 54.60, Lon: -113.65.

AccessURL
Name
GO-ABOVE CDFs for Barrier Lake (barr)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Barrier Lake, Alberta, Lat: 51.01, Lon: -115.05.

AccessURL
Name
GO-ABOVE CDFs for Camrose (cmrs)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Camrose, Alberta, Lat: 53.08, Lon: -112.54.

AccessURL
Name
GO-ABOVE CDFs for Fort McMurray (mcmu)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Fort McMurray, Alberta, Lat: 56.76, Lon: -111.58.

AccessURL
Name
GO-ABOVE CDFs for Fort Smith (fsmi)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Fort Smith, Manitoba, Lat: 59.99, Lon: -111.84.

AccessURL
Name
GO-ABOVE CDFs for Gillam (gill)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Gillam, Manitoba, Lat: 56.38, Lon: -94.64.

AccessURL
Name
GO-ABOVE CDFs for Island Lake (isll)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Island Lake, Manitoba, Lat: 53.85, Lon: -94.66.

AccessURL
Name
GO-ABOVE CDFs for Lucky Lake (luck)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Lucky Lake, Saskatchewan, Lat: 51.15, Lon: -107.26.

AccessURL
Name
GO-ABOVE CDFs for Pinawa (pina)
URL
Description

Directory tree to access Level-1 and Level-2
CDF data at Pinawa, Manitoba, Lat: 50.16, Lon: -96.08.

Format
CDF
InstrumentIDs
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
2014-08-13 18:00:00
StopDate
2019-10-01 05:45:00
Cadence
PT1M
SpectralRange
RadioFrequency
ObservedRegion
Earth.NearSurface.Ionosphere
Parameter #1
Name
Epoch
Support
SupportQuantity
Temporal
Parameter #2
Name
Phase ndk-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_ndk
Description

Phase of VLF transmitter NDK observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #3
Name
Amplitude ndk-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_ndk
Description

Amplitude of VLF transmitter NDK observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #4
Name
Bearing ndk-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_ndk
Description

Bearing to VLF transmitter NDK observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #5
Name
Phase naa-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_naa
Description

Phase of VLF transmitter NAA observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #6
Name
Amplitude naa-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_naa
Description

Amplitude of VLF transmitter NAA observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #7
Name
Bearing naa-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_naa
Description

Bearing to VLF transmitter NAA observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #8
Name
Phase nlk-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_nlk
Description

Phase of VLF transmitter NLK observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #9
Name
Amplitude nlk-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_nlk
Description

Amplitude of VLF transmitter NLK observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #10
Name
Bearing nlk-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_nlk
Description

Bearing to VLF transmitter NLK observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #11
Name
Phase nwc-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_nwc
Description

Phase of VLF transmitter NWC observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #12
Name
Amplitude nwc-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_nwc
Description

Amplitude of VLF transmitter NWC observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #13
Name
Bearing nwc-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_nwc
Description

Bearing to VLF transmitter NWC observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #14
Name
Phase npm-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_npm
Description

Phase of VLF transmitter NPM observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #15
Name
Amplitude npm-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_npm
Description

Amplitude of VLF transmitter NPM observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #16
Name
Bearing npm-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_npm
Description

Bearing to VLF transmitter NPM observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #17
Name
Phase nrk-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_nrk
Description

Phase of VLF transmitter NRK observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #18
Name
Amplitude nrk-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_nrk
Description

Amplitude of VLF transmitter NRK observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #19
Name
Bearing nrk-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_nrk
Description

Bearing to VLF transmitter NRK observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #20
Name
Phase wwvb-(GO-ABOVE station)
ParameterKey
abv_phase_(GO-ABOVE station)_wwvb
Description

Phase of VLF transmitter WWVB observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.

Units
radians
Field
Qualifier
PhaseAngle
FieldQuantity
Magnetic
Parameter #21
Name
Amplitude wwvb-(GO-ABOVE station)
ParameterKey
abv_amp_(GO-ABOVE station)_wwvb
Description

Amplitude of VLF transmitter WWVB observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.

Units
ADC units
Field
Qualifier
Average
FieldQuantity
Magnetic
Parameter #22
Name
Bearing wwvb-(GO-ABOVE station)
ParameterKey
abv_bearing_(GO-ABOVE station)_wwvb
Description

Bearing to VLF transmitter WWVB observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.

Units
degrees
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic