Recent Lidar Technology Developments and Their Influence on Measurements of Tropospheric Water Vapor

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  • 1 Atmospheric Sciences Division, NASA Langley Research Center, Hampton, Virginia
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Abstract

In this paper the influences of recent technology developments in the areas of lasers, detectors, and optical filters of a differential absorption lidar (DIAL) system on the measurement of tropospheric water vapor (H20) profiles are discussed. The lidar parameters selected are based upon a diode-seeded Ti:sapphire laser that is locked to an H20 line in the 820- or 930-nm band of H20. To assess the influence of the mode of deployment on the measurement of tropospheric H20, DIAL performance is evaluated for operation from a medium-altitude (12 km) aircraft the ground, and space-based systems. It is found that incorporation of these developments could greatly enhance DIAL measurement capability.

Abstract

In this paper the influences of recent technology developments in the areas of lasers, detectors, and optical filters of a differential absorption lidar (DIAL) system on the measurement of tropospheric water vapor (H20) profiles are discussed. The lidar parameters selected are based upon a diode-seeded Ti:sapphire laser that is locked to an H20 line in the 820- or 930-nm band of H20. To assess the influence of the mode of deployment on the measurement of tropospheric H20, DIAL performance is evaluated for operation from a medium-altitude (12 km) aircraft the ground, and space-based systems. It is found that incorporation of these developments could greatly enhance DIAL measurement capability.

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