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Applied Optics

Applied Optics


  • Vol. 38, Iss. 15 — May. 20, 1999
  • pp: 3343–3359

Multilateration with the wide-angle airborne laser ranging system: positioning precision and atmospheric effects

Olivier Bock  »View Author Affiliations

Applied Optics, Vol. 38, Issue 15, pp. 3343-3359 (1999)

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Numerical simulations based on previously validated models for the wide-angle airborne laser ranging system are used here for assessing the precision in coordinate estimates of ground-based cube-corner retroreflectors (CCR’s). It is shown that the precision can be optimized to first order as a function of instrument performance, number of laser shots (LS’s), and network size. Laser beam divergence, aircraft altitude, and CCR density are only second-order parameters, provided that the number of echoes per LS is greater than 20. Thus precision in the vertical is ∼1 mm, with a signal-to-noise ratio of 50 at nadir, a 10-km altitude, a 20° beam divergence, and ∼5 × 103 measurements. Scintillation and fair-weather cumulus clouds usually have negligible influence on the estimates. Laser biases and path delay are compensated for by adjustment of aircraft offsets. The predominant atmospheric effect is with mesoscale nonuniform horizontal temperature gradients, which might lead to biases near 0.5 mm.

© 1999 Optical Society of America

OCIS Codes
(120.2830) Instrumentation, measurement, and metrology : Height measurements
(280.3400) Remote sensing and sensors : Laser range finder
(280.3640) Remote sensing and sensors : Lidar

Original Manuscript: January 14, 1998
Revised Manuscript: February 5, 1999
Published: May 20, 1999

Olivier Bock, "Multilateration with the wide-angle airborne laser ranging system: positioning precision and atmospheric effects," Appl. Opt. 38, 3343-3359 (1999)

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