DL0AO VLF-Grabber near Amberg, JN59VK

Receive antennas: Two 150 m long earth dipoles (underground loops): EW = east-west 265°, NS = north-south 355°, and V = active E-field probe
(updated 2018-11-03)

vlf4
360° colour-DF with E and both H antennas (1 Hz FFT, 2 minute scroll)

vlf10
Slow colour-DF, using only the two earth loops (180° ambiguous)

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Alpha colour-DF, 3.9 Hz FFT, two 3.6 s cycles every half hour (green: Krasnodar, red: Novosibirsk, purple: Khabarovsk)

vlf2 vlf6 vlf4
VLF wideband, 1.95 Hz FFT resolution, 2 minute scrolling, upload every 10 minutes (noise blanker and autonotch disabled)
Top: EW, middle: NS, bottom: Vertical

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Opposite cardioids (top: west, bottom: east)

vlf15a
NWC 19.8 kHz amplitude and phase plot (east cardioid)

vlf17
GBZ and NWC (top: west, bottom: east)

vlf17a
NWC faster phase plot (currently 19800.0049 Hz)

vlf12
8.27 kHz 424 µHz Colour-DF

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vlf7
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vlf16
8.27 and 5.17 kHz, 424 µHz FFT, 10 minute scroll (top: EW, 2nd: NS, 3rd: V omni, bottom: W cardioid)

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vlf20
8.27 kHz, 20.93 µHz FFT resolution, 2 hour scroll, EbNaut data export 13.23 h (top: W cardioid, bottom: V omni)

vlf5
970 Hz, 424 µHz FFT, 10 minute scroll (top: EW earth loop, bottom: E-field)

vlf19
ZEVS (Kola Peninsula Transmit Facility, 2475 km) at 82 Hz, 7.63 mHz FFT, 1 minute scroll (E-field)

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vlf13a
ZEVS phase for 81.999990 Hz carrier, 424 µHz FFT, 10 minute scroll (top: colour sequence R-G-B-R for advancing phase, bottom: plot)
Link to dedicated 82 Hz grabber

zevs_fast
Snapshot of a fast ZEVS transmission, using 10 second symbols (45.8 mHz FFT, 5 s scroll)

cardioids_fast
Snapshot of opposite cardioid patterns (top: west 265°, bottom: east 85°)

Blitzortung
European lightning map from Blitzortung.org

VLF grabbers:  DF6NM  DK7FC (tree)  Paul Nicholson  IK1QFK  SQ5BPF   DL0AO (LF)