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

2021-10-05 17:42:52

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 name of the ABOVE station
is given in the filename and file metadata information. 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 observed from ABOVE station to NDK

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

radians

Amplitude Observed from ABOVE Station to NDK

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

ADC units

Bearing Observed From ABOVE Station to NDK

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

degrees

Phase observed from ABOVE station to NAA

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

radians

Amplitude Observed from ABOVE Station to NAA

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

ADC units

Bearing Observed From ABOVE Station to NAA

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

degrees

Phase observed from ABOVE station to NLK

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

radians

Amplitude Observed from ABOVE Station to NLK

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

ADC units

Bearing Observed From ABOVE Station to NLK

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

degrees

Phase observed from ABOVE station to NWC

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

radians

Amplitude Observed from ABOVE Station to NWC

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

ADC units

Bearing Observed From ABOVE Station to NWC

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

degrees

Phase observed from ABOVE station to NPM

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

radians

Amplitude Observed from ABOVE Station to NPM

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

ADC units

Bearing Observed From ABOVE Station to NPM

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

degrees

Phase observed from ABOVE station to NRK

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

radians

Amplitude Observed from ABOVE Station to NRK

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

ADC units

Bearing Observed From ABOVE Station to NRK

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

degrees

Phase observed from ABOVE station to WWVB

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

radians

Amplitude Observed from ABOVE Station to WWVB

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

ADC units

Bearing Observed From ABOVE Station to WWVB

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

degrees