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Global wind profiling is very important to improve the initial conditions for numerical weather prediction and meteorological studies. Current space-based passive sensors and micro sensors have large coverage and high temporal resolution but low vertical resolution. A Doppler Wind Lidar is a useful remote sensing technique for measuring line-of-sight (LOS) wind speed under clear-sky and/or thin-cloudy conditions, and it provides wind profiles with good vertical and temporal resolutions. We will present activities on future space-based lidar in Japan and 2-μm key technology meeting requirements for the future space-based coherent Doppler Wind Lidar.
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