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Proceedings Paper

Spaceborne CO2 laser doppler wind lidar ALADIN: mission and instrument concept
Author(s): Ulrich A. Johann; Rainer Treichel; Frederic Safa; Paul M. Schwarzenberger
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Paper Abstract

A spaceborne Doppler wind lidar (DWL) is a unique instrument for probing atmospheric wind fields on a global scale with high lateral and vertical coverage and resolution. A promising and mature technology is a pulsed CO2-laser based instrument employing heterodyne reception of the Doppler shifted laser light scattered back from atmospheric aerosols. The main features of the proposed instrument concept of ALADIN are a fixed nadir-oriented telescope with an oversized primary mirror and an array of off-axis secondary mirrors, addressing shot azimuth positions on a 30 degree nadir-angle cone. Step scanning is performed by a small focal plane stepper, avoiding lag-angle and torque compensation problems encountered in scanning telescope concepts. Hence, the concept is insensitive to misalignment and employs a minimum of internal alignment control at full scanning capability. It is applicable for an autonomous mission as well as for a mission on the space station.

Paper Details

Date Published: 15 December 1995
PDF: 8 pages
Proc. SPIE 2581, Lidar Techniques for Remote Sensing II, (15 December 1995); doi: 10.1117/12.228508
Show Author Affiliations
Ulrich A. Johann, DASA-Dornier GmbH (Germany)
Rainer Treichel, DASA-Dornier GmbH (Germany)
Frederic Safa, Matra SA (France)
Paul M. Schwarzenberger, GEC-Marconi Hirst Defence (United Kingdom)

Published in SPIE Proceedings Vol. 2581:
Lidar Techniques for Remote Sensing II
Christian Werner, Editor(s)

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