ESA Astronaut Red Sprite Thundercloud ISS
ESA astronaut Andreas Mogensen captured images of a rare red sprite over a thundercloud from the ISS as part of the Thor-Davis experiment on his Huginn mission. This thunder phenomenon is called a Transient Luminous Event (TLE), and occurs above thunderclouds, between 40-80 kilometers (25-50 miles) over the ground.


ESA Astronaut Red Sprite Thundercloud ISS
The image was captured using the Davis camera mounted atop the International Space Station’s camera from the Cupola. Why two cameras? The Davis camera is essentially an event camera, one that functions more like the human eye. It senses change in contrast instead of capturing an image like a regular camera, capable of capturing the equivalent of 100,000 pictures a second while using very low power.

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ESA Astronaut Red Sprite Thundercloud ISS

These images taken by Andreas are fantastic. The Davis camera works well and gives us the high temporal resolution necessary to capture the quick processes in the lightning,” said Olivier Chanrion, lead scientist for this experiment and DTU Space senior researcher.

[Source]