ABOVE Level-2 Amplitude and Phase of VLF transmitter signals at Athabasca (atha)

2023-06-21 17:04:35

Amplitude and phase for narrowband transmitters at
ABOVE site Athabasca, Alberta, Lat: 54.60, Lon: -113.65. 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-atha

abv_phase_atha_ndk

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

radians

Amplitude ndk-atha

abv_amp_atha_ndk

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

ADC units

Bearing ndk-atha

abv_bearing_atha_ndk

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

degrees

Phase naa-atha

abv_phase_atha_naa

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

radians

Amplitude naa-atha

abv_amp_atha_naa

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

ADC units

Bearing naa-atha

abv_bearing_atha_naa

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

degrees

Phase nlk-atha

abv_phase_atha_nlk

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

radians

Amplitude nlk-atha

abv_amp_atha_nlk

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

ADC units

Bearing nlk-atha

abv_bearing_atha_nlk

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

degrees

Phase nwc-atha

abv_phase_atha_nwc

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

radians

Amplitude nwc-atha

abv_amp_atha_nwc

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

ADC units

Bearing nwc-atha

abv_bearing_atha_nwc

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

degrees

Phase npm-atha

abv_phase_atha_npm

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

radians

Amplitude npm-atha

abv_amp_atha_npm

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

ADC units

Bearing npm-atha

abv_bearing_atha_npm

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

degrees

Phase nrk-atha

abv_phase_atha_nrk

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

radians

Amplitude nrk-atha

abv_amp_atha_nrk

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

ADC units

Bearing nrk-atha

abv_bearing_atha_nrk

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

degrees

Phase wwvb-atha

abv_phase_atha_wwvb

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

radians

Amplitude wwvb-atha

abv_amp_atha_wwvb

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

ADC units

Bearing wwvb-atha

abv_bearing_atha_wwvb

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

degrees