ABOVE Level-2 Amplitude and Phase of VLF transmitter signals at Barrier Lake (barr)

2023-06-21 17:04:35

Amplitude and phase for narrowband transmitters at
ABOVE site Barrier Lake, Alberta, Lat: 51.01, Lon: -115.05. 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-barr

abv_phase_barr_ndk

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

radians

Amplitude ndk-barr

abv_amp_barr_ndk

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

ADC units

Bearing ndk-barr

abv_bearing_barr_ndk

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

degrees

Phase naa-barr

abv_phase_barr_naa

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

radians

Amplitude naa-barr

abv_amp_barr_naa

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

ADC units

Bearing naa-barr

abv_bearing_barr_naa

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

degrees

Phase nlk-barr

abv_phase_barr_nlk

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

radians

Amplitude nlk-barr

abv_amp_barr_nlk

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

ADC units

Bearing nlk-barr

abv_bearing_barr_nlk

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

degrees

Phase nwc-barr

abv_phase_barr_nwc

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

radians

Amplitude nwc-barr

abv_amp_barr_nwc

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

ADC units

Bearing nwc-barr

abv_bearing_barr_nwc

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

degrees

Phase npm-barr

abv_phase_barr_npm

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

radians

Amplitude npm-barr

abv_amp_barr_npm

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

ADC units

Bearing npm-barr

abv_bearing_barr_npm

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

degrees

Phase nrk-barr

abv_phase_barr_nrk

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

radians

Amplitude nrk-barr

abv_amp_barr_nrk

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

ADC units

Bearing nrk-barr

abv_bearing_barr_nrk

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

degrees

Phase wwvb-barr

abv_phase_barr_wwvb

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

radians

Amplitude wwvb-barr

abv_amp_barr_wwvb

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

ADC units

Bearing wwvb-barr

abv_bearing_barr_wwvb

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

degrees