ABOVE Level-2 Amplitude and Phase of VLF transmitter signals at Camrose (cmrs)

2023-06-21 17:04:35

Amplitude and phase for narrowband transmitters at
ABOVE site Camrose, Alberta Lat: 53.08, Long: -112.54. 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-cmrs

abv_phase_cmrs_ndk

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

radians

Amplitude ndk-cmrs

abv_amp_cmrs_ndk

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

ADC units

Bearing ndk-cmrs

abv_bearing_cmrs_ndk

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

degrees

Phase naa-cmrs

abv_phase_cmrs_naa

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

radians

Amplitude naa-cmrs

abv_amp_cmrs_naa

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

ADC units

Bearing naa-cmrs

abv_bearing_cmrs_naa

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

degrees

Phase nlk-cmrs

abv_phase_cmrs_nlk

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

radians

Amplitude nlk-cmrs

abv_amp_cmrs_nlk

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

ADC units

Bearing nlk-cmrs

abv_bearing_cmrs_nlk

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

degrees

Phase nwc-cmrs

abv_phase_cmrs_nwc

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

radians

Amplitude nwc-cmrs

abv_amp_cmrs_nwc

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

ADC units

Bearing nwc-cmrs

abv_bearing_cmrs_nwc

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

degrees

Phase npm-cmrs

abv_phase_cmrs_npm

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

radians

Amplitude npm-cmrs

abv_amp_cmrs_npm

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

ADC units

Bearing npm-cmrs

abv_bearing_cmrs_npm

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

degrees

Phase nrk-cmrs

abv_phase_cmrs_nrk

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

radians

Amplitude nrk-cmrs

abv_amp_cmrs_nrk

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

ADC units

Bearing nrk-cmrs

abv_bearing_cmrs_nrk

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

degrees

Phase wwvb-cmrs

abv_phase_cmrs_wwvb

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

radians

Amplitude wwvb-cmrs

abv_amp_cmrs_wwvb

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

ADC units

Bearing wwvb-cmrs

abv_bearing_cmrs_wwvb

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

degrees