Figure 12. Comparison of ASIM and ISS LIS observations of a
lightning flash over Madagascar. (top) an image of the lightning flash
captured by the ASIM camera with ISS LIS events from the group closest
in time to the frame (i.e., black line in bottom panel) plotted as green
symbols whose size correspond to the radiance measured by the LIS camera
and scaled (10-4) to match the same units of ASIM
radiance, which are given in logarithmic scale to enhance the
illuminated pixels. (bottom) time-series of ASIM 777.4 nm photometer
(red) and LIS groups (green) with the shaded region corresponding to the
duration of the ASIM camera frame.