Colour represents spectral power in dB with respect to an arbitrary reference level. These data show discrete rising emissions above a chosus band. The vertical lines are VLF 'atmospherics' from distant lightening discharges.
| AVDAS Spectrum plot, in this case 5kHz x 2.5kHz (though the
ploting parameters may be varied over a wide range), of the
broadband data from Halley on 12th May 1995 at 1738:29 UT. Colour represents spectral power in dB with respect to an arbitrary reference level. These data show discrete rising emissions above a chosus band. The vertical lines are VLF 'atmospherics' from distant lightening discharges. |
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