Spaceborne lidar: Development of a laboratory test system

Computer Science – Sound

Scientific paper

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Atmospheric Sounding, Backscattering, Optical Radar, Spaceborne Lasers, Alignment, Fiber Optics, Performance Tests, Radar Transmitters, Scanners

Scientific paper

The design, realization, and testing of a functional backscatter lidar intended to validate the overall system design concept of operational spaceborne lidar instruments, and to aid in the development and optimization of the lidar components are described. It is a compact lidar that allows easy modification of components to verify their performance in the overall system. It performs atmospheric measurements through the window of a laboratory and thus is not optimized with respect to size, mass, and power consumption. A fiber optics coupler connects the scanning receiving telescope with the detector package. Thus the positioning of the detectors becomes uncritical for the instrument alignment, allowing use of a particularly simple and light structure that still warrants high alignment stability of the components. This scanner arrangement performs well in tests and is recommended as baseline design for the spaceborne lidar. A frequency-doubled Nd:YAG transmitter laser is suggested.

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