LIDARs are made of several components working togheter to give high level of accuracy of the atmospheric parameters. For this reason, periodic inspection of both optical and electronic components is essential to achieve and maintain optimal performance. Moreover, LIDAR systems operating within international networks must be regularly compared with reference systems, which are often located at distant sites.

LAST marks a step change in LIDAR testing and calibration: it enables precise verification of receiver optical alignment, accurate assessment of acquisition system linearity, and comprehensive calibration of all critical parameters required to ensure global consistency and comparability of measurements.