ABOVE Level-2 Amplitude and Phase of VLF transmitter signals at Gillam (gill)

2023-06-21 17:04:35

Amplitude and phase for narrowband transmitters at
ABOVE site Gillam, Manitoba, Lat: 56.38, Lon: -94.64. 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-gill

abv_phase_gill_ndk

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

radians

Amplitude ndk-gill

abv_amp_gill_ndk

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

ADC units

Bearing ndk-gill

abv_bearing_gill_ndk

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

degrees

Phase naa-gill

abv_phase_gill_naa

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

radians

Amplitude naa-gill

abv_amp_gill_naa

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

ADC units

Bearing naa-gill

abv_bearing_gill_naa

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

degrees

Phase nlk-gill

abv_phase_gill_nlk

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

radians

Amplitude nlk-gill

abv_amp_gill_nlk

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

ADC units

Bearing nlk-gill

abv_bearing_gill_nlk

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

degrees

Phase nwc-gill

abv_phase_gill_nwc

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

radians

Amplitude nwc-gill

abv_amp_gill_nwc

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

ADC units

Bearing nwc-gill

abv_bearing_gill_nwc

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

degrees

Phase npm-gill

abv_phase_gill_npm

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

radians

Amplitude npm-gill

abv_amp_gill_npm

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

ADC units

Bearing npm-gill

abv_bearing_gill_npm

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

degrees

Phase nrk-gill

abv_phase_gill_nrk

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

radians

Amplitude nrk-gill

abv_amp_gill_nrk

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

ADC units

Bearing nrk-gill

abv_bearing_gill_nrk

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

degrees

Phase wwvb-gill

abv_phase_gill_wwvb

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

radians

Amplitude wwvb-gill

abv_amp_gill_wwvb

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

ADC units

Bearing wwvb-gill

abv_bearing_gill_wwvb

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

degrees