The LAZ, OBS, SMD, and YEP folders contain the raw image files captured by the NicAIR thermal camera systems. The names match those used in the article. The 'IR Camera Locations.km' contains information of the camera coordinates.

The images can be interpreted using any software/scripts capable of reading FITS (Flexible Image Transport System) files. There is a python library for working with these files (astropy.io.fits), and a viewer is available from EASA (http://www.spacetelescope.org/projects/fits_liberator/)

The images are named sequentially. The naming conventions is:

YYYYDDD####AB.raw

, where YYYY is the year, DDD is the day of the year, #### is the picture sequence number (a sequential counter starting at the beginning of the day), A is a number between 1 and 4 indicating the filter slot, B is either 'r' for a shutter temperature calibration image (shutter closed), 's' for an image of the volcano (shutter open). Note that only the broadband (no filter) images have been provided since only those were considered in this study. Please get in contact if the multi-spectral filtered images are of interest.

The fits files are a FITS type (with additional metadata). Each file contains one image with an associate header file . The header contains:

BITPIX  int                 Number of bits per pixel in the image data
NAXIS1  int                 Image pixel width
NAXIS2  int                 Image pixel height
IDAT    Date-Time string    When the sequence of images started to be captured
SDAT    Date-Time string    When an image was captured
EDAT    Date-Time string    When an image finished being captured
FILT    string              The current filter on the lens

The images contain the raw micobolometer count matrices in an array of 32 bit floating point numbers.