https://atmos.meteo.uni-koeln.de/ag_crewell/ 2026-05-04T01:46:59+00:00 https://atmos.meteo.uni-koeln.de/ag_crewell/ https://atmos.meteo.uni-koeln.de/ag_crewell/lib/exe/fetch.php?media=wiki:logo.png text/html 2026-01-31T09:41:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=inactive:instruments:sodar:sodar&rev=1769852494&do=diff Sodar Mentor: J.H. Schween. Principle A SODAR is a wind profiler based on the sonic detecting and ranging principle. A sound is emitted and backscattered at inhomogeneities of the temperature field. Travel time of the backscattered sound signal is related to distance, Doppler shift gives the wind speed along the sound beam. Several tilted sound beams allow to infer the vector components of the wind. Strength of the reflected signal gives information about the turbulence intensity.