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Proceedings Paper

Precision geo-location at long range with multi-look lidar
Author(s): Michael W. Roth; Andrew E. Scheck; Wendy W. Chiu; Kevin E. Murphy
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Paper Abstract

Precision geo-location (absolute accuracy of 20 cm or less) is required of high-resolution lidar data (1 m or less post spacing) for general surveying needs and high-quality visualization. Current open-loop airborne-hardware pointing-technology supports precision geo-location at short range (less than a few km). Precision geo-location at longer range can be achieved with more complex pointing-hardware but at substantial cost. This paper introduces the concept of multi-look lidar that has the potential for achieving long-range precision geo-location but at substantially reduced cost. In this concept, lidar data are collected at multiple look-angles that are consistent with Position-Dilution-Of-Precision (PDOP) requirements. The data are registered, triangulated, and block-adjusted with a dense set of self-generated control points. An analytic model is presented that shows that the error performance is independent of range. A flight test is described that validates the multi-look-lidar concept. Potential system-implementations are also described that can have minimal impact on hardware or conventional flight operations.

Paper Details

Date Published: 19 May 2005
PDF: 9 pages
Proc. SPIE 5791, Laser Radar Technology and Applications X, (19 May 2005); doi: 10.1117/12.609685
Show Author Affiliations
Michael W. Roth, Johns Hopkins Univ. Applied Physics Lab. (United States)
Andrew E. Scheck, Johns Hopkins Univ. Applied Physics Lab. (United States)
Wendy W. Chiu, Johns Hopkins Univ. Applied Physics Lab. (United States)
Kevin E. Murphy, Johns Hopkins Univ. Applied Physics Lab. (United States)

Published in SPIE Proceedings Vol. 5791:
Laser Radar Technology and Applications X
Gary W. Kamerman, Editor(s)

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