A 15cm aperture LED scintillometer for cn2 and crosswind measurements

An optical scintillometer was built to measure the refractive index structure parameter (CN2) and the wind speed across the transmission path. The device uses a LED (light emitting diode) at 0.94 μm as a light source and simple semiconductor light detectors. The aim of this report is to give a brief description of the scintillometer and some results we got with it on a test path of 449 m at Cabauw, The Netherlands.