Page 5: Research news on lidar

Lidar (Light Detection and Ranging) is a remote sensing method that measures distance to targets by emitting rapid laser pulses and recording the time-of-flight of the backscattered signal to reconstruct three-dimensional spatial information. Operating typically in the near-infrared or ultraviolet-visible spectrum, lidar systems integrate a laser transmitter, scanning optics, timing electronics, and sensitive detectors (e.g., APDs, SPADs) to achieve centimeter- to meter-scale ranging precision. Methodological variants include airborne and terrestrial lidar for topographic mapping, bathymetric lidar using water-penetrating wavelengths, and Doppler lidar for wind profiling, with data processed into point clouds, digital elevation models, and other quantitative geospatial products.