GOES magnetometer ULF audible dataset
M. O. Archer (m.archer@qmul.ac.uk), R. Redmon (rob.redmon@noaa.gov)

GOES magnetometer data in the ultra-low frequency (ULF) range have been converted into Ogg Vorbis audio format.
The original GOES data have been converted into an orthogonal mean field-aligned coordinate system (34min window) where:
com (compressional) - along the mean field direction (running mean also subtracted from timeseries)
pol (poloidal) - predominantly radially outwards from Earth
tor (toroidal) - predominantly azimuthally eastwards

The 512ms resolution data has been boxcar averaged by 4 datapoints and written to audio at 44,100 Hz sampling frequency
such that waves from 0.5-244 mHz map to the human audible range.

'diff' files have been time-differenced in order to whiten the spectra.
'all' files have the pol component in the left channel, tor in the right, and com shared between both (0.5x in each channel)

Amplitude scaling has been performed from nT to dimensionless audio units (between -1 and 1). The amplitude factors are
10nT and 1nT for the non-differenced and differenced files respectively. Any values above these have been clipped.

Each file is exactly 1 year long to enable conversion back into universal time. Missing data are represented as zeros.

For further details please see:
First results from sonification and exploratory citizen science of magnetospheric ULF waves:
Long-lasting decreasing-frequency poloidal field line resonances following geomagnetic storms.
M. O. Archer, M. D. Hartinger, R. Redmon, V. Angelopoulos, B. M. Walsh, and Eltham Hill School Year 12 Physics students.
Space Weather.

Audacity version 2.2.2 was used in the project and can be acquired here:
https://sourceforge.net/projects/portableapps/files/Audacity%20Portable/