Journal ArticleDOI
Two-channel direct-detection Doppler lidar employing a charge-coupled device as a detector.
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TLDR
A direct-detection Doppler lidar system is demonstrated that uses a CCD as a detector for the first time to the authors' knowledge and has the capability to measure winds from aerosol and molecular backscatter simultaneously in two separate channels by directing the light reflected from one channel into the other.Abstract:
A direct-detection Doppler lidar system is demonstrated that uses a CCD as a detector for the first time to our knowledge. The ability to use this linear device with the circular output from a Fabry-Perot etalon comes from use of a circle-to-line converter [Appl. Opt. 29, 1482 (1990)]. In addition to the gains in quantum efficiency obtained through use of this detector, the lidar system described in this paper also has the capability to measure winds from aerosol and molecular backscatter simultaneously in two separate channels by directing the light reflected from one channel into the other. Early measurements with this system are presented; it is shown that, although accurate aerosol wind measurements are easily obtained, molecular measurements require a carefully calibrated inverse model and special hardware to derive accurate wind measurements with this channel.read more
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Patent
Atmospheric measurement system
TL;DR: In this article, a magnitude and direction of a velocity of a first portion (17) of an atmosphere is determined from at least first and second portions of scattered light generated along a common beam of light within the first portion of the atmosphere (20) and received along linearly independent directions at locations that are relatively remote with respect to one another.
Journal ArticleDOI
The Airborne Demonstrator for the Direct-Detection Doppler Wind Lidar ALADIN on ADM-Aeolus. Part I: Instrument Design and Comparison to Satellite Instrument
Oliver Reitebuch,Christian Lemmerz,Engelbert Nagel,Ulrike Paffrath,Yannig Durand,Martin Endemann,Frederic Fabre,Marc Chaloupy +7 more
TL;DR: In this article, the European Space Agency (ESA) decided to implement a Doppler wind lidar mission called the Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) to demonstrate the potential of the doppler lidar technology and the expected impact on numerical weather forecasting.
Journal ArticleDOI
LIDAR-MEASURED WIND PROFILES The Missing Link in the Global Observing System
W. E. Baker,Robert Atlas,Carla Cardinali,Amy C. Clement,G. D. Emmitt,Bruce M. Gentry,R. Michael Hardesty,Erland Källén,Michael J. Kavaya,Rolf H. Langland,Zaizhong Ma,Michiko Masutani,Will McCarty,R. Bradley Pierce,Zhaoxia Pu,Lars Peter Riishojgaard,James M. Ryan,Sara C. Tucker,Martin Weissmann,James G. Yoe +19 more
TL;DR: The European Space Agency (ESA)'s Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) Doppler wind lidar (DWL), now scheduled for launch in 2015, will be a major milestone as mentioned in this paper.
Patent
Optical air data system
Paul B. Hays,Michael T. Dehring,Jane C. Pavlich,Peter Tchoryk,Charles J. Richey,Anthony B. Hays,Gregory J. Wassick,Greg Ritter +7 more
TL;DR: In this article, the Fabry-Perot etalon was used to detect fringe patterns from a first beam of light generated by a laser in the atmosphere. But the fringe patterns were not used to identify the source of the light signal, and the resulting fringe pattern was not detected by a detector adapted to output a resulting signal responsive to the signal.
Patent
Range imaging lidar
TL;DR: In this article, light scattered by a portion of a fluid medium (16) illuminated by a beam (18) of substantially monochromatic light (14) is received within a field-of-view (34) nominally along an axis (36) oriented in a different direction (θ) relative to the beam, and processed by an interferometer (44) to generate a corresponding fringe pattern (60) that is detected and processed to generate at least one measure (A, M, U, u, T, t, B, p, Ts
References
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Journal ArticleDOI
The high-resolution Doppler imager on the Upper Atmosphere Research Satellite
Paul B. Hays,Vincent J. Abreu,Michael E. Dobbs,David A. Gell,Heinz J. Grassl,Wilbert R. Skinner +5 more
TL;DR: The high-resolution Doppler imager (HRDI) on the Upper Atmosphere Research Satellite is a triple-etalon Fabry-Perot interferometer designed to measure winds in the stratosphere, mesosphere, and lower thermosphere.
MonographDOI
The Fabry-Perot Interferometer : History, Theory, Practice and Applications
TL;DR: In this article, the authors present an overview of the basic elements of optical spectroscopy, including the Plane Fabry-Perot Interferometer (PFI), the Spherical FFI (SFI), and the FFI-MIMO (FIFO) interferometer.
Journal ArticleDOI
A Doppler lidar for measuring winds in the middle atmosphere
TL;DR: In this paper, a Doppler Lidar is used to measure the wave-mean flow interaction in the middle atmosphere using Rayleigh scattering from air molecules, which is designed to cover the height range 25-60 km, where radars cannot operate.
Journal ArticleDOI
Edge technique: theory and application to the lidar measurement of atmospheric wind.
TL;DR: The frequency shift measurement insensitive to both laser and filter frequency jitter and drift is shown to be insensitive to the laser width and shape for widths that are less than the half-width of the edge filter.