ABOVE Level-2 Amplitude and Phase of VLF transmitter signals at Fort McMurray (mcmu)

2023-06-21 17:04:35

Amplitude and phase for narrowband transmitters at
ABOVE site Fort McMurray, Alberta, Lat: 56.76, Lon: -111.58. 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.

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.

CDF

PT1M

Epoch

Phase ndk-mcmu

abv_phase_mcmu_ndk

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

radians

Amplitude ndk-mcmu

abv_amp_mcmu_ndk

Amplitude of VLF transmitter NDK observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing ndk-mcmu

abv_bearing_mcmu_ndk

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

degrees

Phase naa-mcmu

abv_phase_mcmu_naa

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

radians

Amplitude naa-mcmu

abv_amp_mcmu_naa

Amplitude of VLF transmitter NAA observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing naa-mcmu

abv_bearing_mcmu_naa

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

degrees

Phase nlk-mcmu

abv_phase_mcmu_nlk

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

radians

Amplitude nlk-mcmu

abv_amp_mcmu_nlk

Amplitude of VLF transmitter NLK observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing nlk-mcmu

abv_bearing_mcmu_nlk

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

degrees

Phase nwc-mcmu

abv_phase_mcmu_nwc

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

radians

Amplitude nwc-mcmu

abv_amp_mcmu_nwc

Amplitude of VLF transmitter NWC observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing nwc-mcmu

abv_bearing_mcmu_nwc

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

degrees

Phase npm-mcmu

abv_phase_mcmu_npm

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

radians

Amplitude npm-mcmu

abv_amp_mcmu_npm

Amplitude of VLF transmitter NPM observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing npm-mcmu

abv_bearing_mcmu_npm

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

degrees

Phase nrk-mcmu

abv_phase_mcmu_nrk

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

radians

Amplitude nrk-mcmu

abv_amp_mcmu_nrk

Amplitude of VLF transmitter NRK observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing nrk-mcmu

abv_bearing_mcmu_nrk

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

degrees

Phase wwvb-mcmu

abv_phase_mcmu_wwvb

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

radians

Amplitude wwvb-mcmu

abv_amp_mcmu_wwvb

Amplitude of VLF transmitter WWVB observed at mcmu.
Amplitude is calculated separately for North-South and East-West antennas.

ADC units

Bearing wwvb-mcmu

abv_bearing_mcmu_wwvb

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

degrees