ABOVE Level-2 Amplitude and Phase of VLF transmitter signals at Island Lake (isll)

2023-06-21 17:04:35

Amplitude and phase for narrowband transmitters at
ABOVE site Island Lake, Manitoba, Lat: 53.85, Lon: -94.66. 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-isll

abv_phase_isll_ndk

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

radians

Amplitude ndk-isll

abv_amp_isll_ndk

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

ADC units

Bearing ndk-isll

abv_bearing_isll_ndk

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

degrees

Phase naa-isll

abv_phase_isll_naa

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

radians

Amplitude naa-isll

abv_amp_isll_naa

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

ADC units

Bearing naa-isll

abv_bearing_isll_naa

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

degrees

Phase nlk-isll

abv_phase_isll_nlk

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

radians

Amplitude nlk-isll

abv_amp_isll_nlk

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

ADC units

Bearing nlk-isll

abv_bearing_isll_nlk

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

degrees

Phase nwc-isll

abv_phase_isll_nwc

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

radians

Amplitude nwc-isll

abv_amp_isll_nwc

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

ADC units

Bearing nwc-isll

abv_bearing_isll_nwc

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

degrees

Phase npm-isll

abv_phase_isll_npm

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

radians

Amplitude npm-isll

abv_amp_isll_npm

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

ADC units

Bearing npm-isll

abv_bearing_isll_npm

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

degrees

Phase nrk-isll

abv_phase_isll_nrk

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

radians

Amplitude nrk-isll

abv_amp_isll_nrk

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

ADC units

Bearing nrk-isll

abv_bearing_isll_nrk

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

degrees

Phase wwvb-isll

abv_phase_isll_wwvb

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

radians

Amplitude wwvb-isll

abv_amp_isll_wwvb

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

ADC units

Bearing wwvb-isll

abv_bearing_isll_wwvb

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

degrees