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Proceedings Paper

ALADIN: an atmosphere laser doppler wind lidar instrument for wind velocity measurements from space
Author(s): Rodolphe Krawczyk; Jean-Bernard Ghibaudo; Jean-Yves Labandibar; David V. Willetts; M. Vaughan; Guy N. Pearson; Michael R. Harris; Pierre H. Flamant; P. Salamitou; Alain M. Dabas; Remi Charasse; Thierry Midavaine; Michel Royer; H. Heimel
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Paper Abstract

AEROSPATIALE, leading a European team, has just conducted a successful study, under ESA contract, to demonstrate the feasibility of a spaceborne Doppler wind lidar instrument meeting the scientific requirements of wind velocity measurements from space with high spatial resolution. A first parametric investigation, based upon the initial set of mission requirements, and supported by dedicated models and detailed trade-off studies, took account of capabilities of the most promising signal processing algorithms and calibration/validation constrains: it yielded a large conically scanned instrument deemed technologically risky. A risk analysis was then carried out to propose a less challenging instrument meeting most key mission requirements. The fixed line-of-sight concept with return signal accumulation appeared as most attractive. A second set of requirements agreed upon by scientific users was therefore issued, with relaxed constraints mainly on horizontal resolution, keeping roughly the same level of wind velocity measurement accuracy. A second instrument and subsystem trade- off was then performed to eventually produce an attractive instrument concept based upon a pair of small diameter telescopes each one associated to one scanning mirror rotating stepwise around the telescope axis, which drastically reduces the detection bandwidth. Following the main contract, studies of accommodation on the International Space Station have been performed, confirming the interest of such an instrument for wind measurements from space.

Paper Details

Date Published: 15 December 1995
PDF: 12 pages
Proc. SPIE 2581, Lidar Techniques for Remote Sensing II, (15 December 1995); doi: 10.1117/12.228509
Show Author Affiliations
Rodolphe Krawczyk, Aerospatiale (France)
Jean-Bernard Ghibaudo, Aerospatiale (France)
Jean-Yves Labandibar, Aerospatiale (France)
David V. Willetts, Defence Research Agency Malvern (United Kingdom)
M. Vaughan, Defence Research Agency Malvern (United Kingdom)
Guy N. Pearson, Defence Research Agency Malvern (United Kingdom)
Michael R. Harris, Defence Research Agency Malvern (United Kingdom)
Pierre H. Flamant, CNRS (France)
P. Salamitou, CNRS (France)
Alain M. Dabas, CNRS (France)
Remi Charasse, Societe Anonyme de Telecommunications (France)
Thierry Midavaine, Societe Anonyme de Telecommunications (France)
Michel Royer, Societe Anonyme de Telecommunications (France)
H. Heimel, Teldix (Germany)

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

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