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Applied Optics

Applied Optics


  • Vol. 40, Iss. 21 — Jul. 20, 2001
  • pp: 3450–3461

Airborne lidar LEANDRE II for water-vapor profiling in the troposphere. I. System description

Didier Bruneau, Philippe Quaglia, Cyrille Flamant, Mireille Meissonnier, and Jacques Pelon  »View Author Affiliations

Applied Optics, Vol. 40, Issue 21, pp. 3450-3461 (2001)

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The airborne differential absorption lidar LEANDRE II, developed for profiling tropospheric water-vapor mixing ratios, is described. The emitter is a flash-lamp-pumped alexandrite laser, which operates in a double-pulse, dual-wavelength mode in the 727–736 nm spectral domain. Two 50-mJ successive on-line and off-line pulses with an output linewidth of 2.4 × 10-2 cm-1 and a spectral purity larger than 99.99% are emitted at a 50-µs time interval. The spectral positioning is controlled in real time by a wavemeter with an absolute accuracy of 5 × 10-3 cm-1. The receiver is a 30-cm aperture telescope with a 3.5-mrad field of view and a 1-nm filter bandwidth. These instrument characteristics are defined for measuring the water-vapor mixing ratio with an accuracy better than 0.5 g kg-1 in the first 5 km of the atmosphere with a range resolution of 300 m, integration on 100 shots, and an instrumental systematic error of less than 2%. The sensitivity study and first results are presented in part II [Appl. Opt. 40, 3462–3475 (2001)].

© 2001 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(010.7340) Atmospheric and oceanic optics : Water
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar

Original Manuscript: June 16, 2000
Revised Manuscript: January 26, 2001
Published: July 20, 2001

Didier Bruneau, Philippe Quaglia, Cyrille Flamant, Mireille Meissonnier, and Jacques Pelon, "Airborne lidar LEANDRE II for water-vapor profiling in the troposphere. I. System description," Appl. Opt. 40, 3450-3461 (2001)

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