SPASE Resource Description

spase://CSA/NumericalData/GO-ABOVE/VLF/L2/PT1M

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

	Role	Person	StartDate	StopDate	Note
1.	PrincipalInvestigator	spase://SMWG/Person/C.M.Cully
2.	MetadataContact	spase://SMWG/Person/Leonard.N.Garcia

RepositoryID

spase://CSA/Repository/UCalgary

AccessURL

Name

GO-ABOVE CDFs for Athabasca (atha)

URL

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/Athabasca/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/BarrierLake/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/Camrose/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/FortMcMurray/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/FortSmith/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/Gillam/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/IslandLake/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/LuckyLake/PT1M.html

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

/WS/hdp/1/Spase?ResourceID=spase://CSA/NumericalData/GO-ABOVE/VLF/L2/Pinawa/PT1M.html

Description

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

Format

CDF

spase://SMWG/Instrument/Athabasca/VLF

Waves.Passive

TimeSpan

StartDate

2014-08-13 18:00:00

StopDate

2019-10-01 05:45:00

Cadence

PT1M

RadioFrequency

Earth.NearSurface.Ionosphere

Name

Epoch

Support

SupportQuantity

Temporal

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

ABOVE Level-2 Amplitude and Phase of VLF transmitter signals

Details

NumericalData