Spaceborne CO2 laser doppler wind lidar ALADIN: mission and instrument concept

Ulrich A. Johann; Rainer Treichel; Frederic Safa; Paul M. Schwarzenberger

doi:10.1117/12.228508

15 December 1995 Spaceborne CO₂ laser doppler wind lidar ALADIN: mission and instrument concept

Ulrich A. Johann, Rainer Treichel, Frederic Safa, Paul M. Schwarzenberger

Proceedings Volume 2581, Lidar Techniques for Remote Sensing II; (1995) https://doi.org/10.1117/12.228508
Event: Satellite Remote Sensing II, 1995, Paris, France

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.

Citation Download Citation

Ulrich A. Johann, Rainer Treichel, Frederic Safa, and Paul M. Schwarzenberger "Spaceborne CO₂ laser doppler wind lidar ALADIN: mission and instrument concept", Proc. SPIE 2581, Lidar Techniques for Remote Sensing II, (15 December 1995); https://doi.org/10.1117/12.228508

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