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9 December 1994 European Space Agency technology activities for spaceborne Doppler wind lidar
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The European Space Agency is supporting the development of key technologies for future spaceborne Doppler wind lidar instruments. The focus for this work is the ALADIN (Atmospheric Laser Doppler Instrument) program which is directed towards the establishment of a coherent CO2-laser based lidar system to improve operational meteorology and climate science. Technology support for this program has to date centered on the development of a 10 J class electron-beam sustained CO2 laser. The stringent alignment tolerances necessary for coherent spaceborne lidar systems have been addressed by the manufacture and test of a single-axis lag-angle and image-motion compensator. Receiver related work has to date concentrated on advanced signal processing algorithms. An alternative approach to coherent DWL (Doppler Wind Lidar) that shows promise for the longer term is a 2 micrometers lidar based upon InGaAs detection and the all-solid-state Tm:Ho:Host laser. These technologies, which may also find application within a spaceborne water-vapor DIAL (Differential Absorption Lidar), have been the subject of experimental activities in relation to spectroscopy, cw lasing and heterodyne efficiency. Also under development is incoherent DWL operating in the ultra-violet which, whilst not capable of the ultimate sensitivity of coherent lidar, is attractive for its reduced alignment tolerances and can be considered for climate and atmospheric research.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Callum J. Norrie, Andrea E. Marini, and Errico Armandillo "European Space Agency technology activities for spaceborne Doppler wind lidar", Proc. SPIE 2310, Lidar Techniques for Remote Sensing, (9 December 1994);


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