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Japan Aerospace Exploration Agency

R&D of onboard safety avionics technology to prevent turbulence-induced aircraft accidents (SafeAvio)


August 31, 2012

World's first successful advanced detection of clear air turbulence

JAXA's on-board Doppler LIDAR

JAXA has succeeded with the world's first advanced detection of clear air turbulence using the Doppler LIDAR that is being developed.
Doppler LIDAR is a device that emits a laser light to estimate the movement of small water droplets and dust in the atmosphere. Large-sized systems set up at airports to detect turbulence occurring near the ground are already in practical use, but JAXA is continuing development of a miniaturized system that can be mounted on aircraft. As a result, during a test flight in February of this year, we were able to detect clear air turbulence 6 km ahead and 3.2 km above the shore of the Kii Peninsula 30 seconds before it was reached.