Overview of the DLR 2 micron Doppler lidar campaigns with emphasis on possibilities and limits of signal processing

摘要

In the past three years several airborne campaigns all over the world with the DLR two micron Doppler lidar installed onboard the Falcon F20 research aircraft were performed. The scientific goals of these campaigns reached from the study of transport phenomena of Saharan dust over the Atlantic Ocean (SALTRACE) to gravity wave measurements in Sweden (GWLCYCLE) and New Zealand (DEEPWAVE). A comparison campaign with the ADM direct detection lidar on Iceland (WindVal) together with the NASA DC8 was also performed. This paper will give a brief overview of the campaigns and then focuses on the data processing. The accumulation of all LOS spectra of a VAD scan into one Spectrum in order to improve the coverage is presented. Furthermore the challenge of extracting a wind vector out of a set of LOS estimates of a VAD scan in the presence of gravity waves will also be addressed.