  The ILAN-ES (Imaging of Lightning And Nocturnal Emissions from Space)
experiment was conducted in April 2022 as part of the Axiom company AX-1
private mission to the International Space Station, in the framework of Rakia,
an Israeli set of experiments selected for flight by the Ramon Foundation and
the Israeli Space Agency. The mission objective was to record transient
luminous events from the Cupola window in the ISS, based on preliminary
thunderstorm forecasts uploaded to the crew 24-36 hours in advance. A Nikon D6
camera with a 50 mm lens was used, in a video mode of 60 fps. During the 12-day
mission, 82 different targets were identified for the ISS, of which 20 were
imaged by the astronauts, yielding a total harvest > 80 TLEs: sprites, Elves
and BLUEs (blue corona discharges). We report here on opportune nadir
observation of a thunderstorm that produced multiple blue events near the
Myanmar-Thailand border on April 21st, 2022, at 21:30 UT. The storm produced
many visible blue discharges of varying sizes and durations, in sizes ranging
from hundreds of meters to a few km2. The emissions were mostly in blue,
however the brightest events had also a conspicuous red component. We used
meteorological and ENTLN lightning data to establish the relationship between
lightning type and the observable properties of the blue corona discharges.
