Retrieval of environmental parameters from multiply-scattered return signals of ground-based and airborne lidars

Martin Kerscher; Heike Krasting; Ulrich G. Oppel

doi:10.1117/12.221068

20 September 1995 Retrieval of environmental parameters from multiply-scattered return signals of ground-based and airborne lidars

Martin Kerscher, Heike Krasting, Ulrich G. Oppel

Author Affiliations +

Proceedings Volume 2506, Air Pollution and Visibility Measurements; (1995) https://doi.org/10.1117/12.221068
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

We present some examples of calculations of polarized multiply scattered return signals of ground-based and airborne multichannel LIDARs (such as the Microlidar of the DLR) and we discuss the applied numerical methods. These methods are variance reduction Monte Carlo algorithms allowing for controlling the empirical variance. We show how variance reduction Monte Carlo algorithms allowing for controlling hte empirical variance. We show how variance reduction Monte Carlo methods may be combined with properly chosen uniform grid search or random search procedures to retrieve one or more environmental parameters from a given (measured or calculated) LIDAR return signal. Such a procedure is time consuming, of course, but it will allow for the retrieval of several parameters simultaneously and for a sensitivity analysis. A retrieval method based on Monte Carlo methods and random search including such a sensitivity analysis gives much more information than the usual inversion procedures (e.g. based on integral equations and often uncheckable environmental assumptions). We present some examples of the (simultaneous) retrieval of the extinction coefficient and the particle size distribution of a cloud from the multiply scattered return signal of gorund-based and airborne LIDARs and a sensitivity analysis of this retrieval.

Citation Download Citation

Martin Kerscher, Heike Krasting, and Ulrich G. Oppel "Retrieval of environmental parameters from multiply-scattered return signals of ground-based and airborne lidars", Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); https://doi.org/10.1117/12.221068

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