On-Line Data System for the DFVLR-Laser-Doppler-Anemometer

Abstract

The DFVLR infrared Doppler lidar is a cw homodyne system designed for boundary layer wind measurements, especially for aircraft related wind phenomena like the low level jet, shear winds and wake vorticities. The system is similar in size and optical layout to Doppler lidars in other research groups (as for example Schwiesow et al.1981). It has features to make convenient wind determination. Three of these features are scanning, readout, and data reduction. The on-line data system is described in this part.