ICEBEAR 3D data for 23 April 2023, organized in a matlab struct. The struct contains the following fields, all of which is an array with one element per detected radar echo: t -- (Matlab datenumber)lat -- (geographic latitude in degrees)lon -- (geographic longitude in degrees)snr -- (signal-to-noise ratio)doppler -- (Doppler speed in m/s)azimuth -- (radar azimuth in degrees)el -- (radar elevation angle in degrees)alt* -- (altitude in km)mlat** -- (geomagnetic latitude)mlon** -- (geomagnetic longitude)mlt** -- (magnetic local time) * Altitudes for azimuths <-5 degrees are anomalous ** calculated using the AACGM system, extrapolated from outdated coefficients Contact Prof. Glenn Hussey (glenn.hussey [at] usask.ca) before using this data in a publication.