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A Differential Absorption Lidar System For High Resolution Water Vapour Measurements In The Troposphere
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Book Synopsis A Differential Absorption Lidar System for High Resolution Water Vapour Measurements in the Troposphere by : Jens Bosenberg
Download or read book A Differential Absorption Lidar System for High Resolution Water Vapour Measurements in the Troposphere written by Jens Bosenberg and published by . This book was released on 1991 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Differential Absorption Lidar System for High Resolution Water Vapor Measurements in the Troposphere by :
Download or read book A Differential Absorption Lidar System for High Resolution Water Vapor Measurements in the Troposphere written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A differential absorption lidar system for the high resolution water vapor measurements in the troposphere by : Jens Bösenberg
Download or read book A differential absorption lidar system for the high resolution water vapor measurements in the troposphere written by Jens Bösenberg and published by . This book was released on 1991 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Feasibility of Tropospheric Water Vapor Profiling Using Infrared Heterodyne Differential Absorption Lidar by :
Download or read book Feasibility of Tropospheric Water Vapor Profiling Using Infrared Heterodyne Differential Absorption Lidar written by and published by . This book was released on 1995 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous, high quality profiles of water vapor, free of systematic bias, and of moderate temporal and spatial resolution, acquired over long periods at low operational and maintenance cost, are fundamental to the success of the ARM CART program. The development and verification of realistic climate model parameterizations for clouds and net radiation balance, and the correction of other CART site sensor observations for interferences due to the presence of water vapor are critically dependent on water vapor profile measurements. Application of profiles acquired with current techniques, have, to date, been limited by vertical resolution and uniqueness of solution [e.g. high resolution infrared (IR) Fourier transform radiometry], poor spatial and temporal coverage and high operating cost (e.g. radiosondes), or diminished daytime performance, lack of eye-safety, and high maintenance cost (e.g. Raman lidar). Recent developments in infrared laser and detector technology make possible compact IR differential absorption lidar (DIAL) systems at eye-safe wavelengths. In the study reported here, we develop DIAL system performance models and examine the potential of to solve some of the shortcomings of previous methods using parameterizations representative of current technologies. These models are also applied to diagnose and evaluate other strengths and weaknesses unique to the DIAL method for this application. This work is to continue in the direction of evaluating yet smaller and lower-cost laser diode-based systems for routine monitoring of the lower altitudes using photon counting detection methods. We regard the present report as interim in nature and will update and extend it as a final report at the end of the term of the contract.
Book Synopsis Monitoring Atmospheric Water Vapour by : Niklaus Kämpfer
Download or read book Monitoring Atmospheric Water Vapour written by Niklaus Kämpfer and published by Springer Science & Business Media. This book was released on 2012-09-13 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric water plays a key role in climate. Water vapour is the most important greenhouse gas and its condensed forms exert a profound influence on both incoming solar and outgoing infrared radiation. Unfortunately, accurate, height-resolved global-scale measurements of atmospheric humidity are difficult to obtain. The change in concentration of five orders of magnitude form the ground to the stratosphere means there is no standard instrument that will measure everywhere. This has led to different measuring techniques, all with strengths and weaknesses. This book assesses all presently available techniques that are used in monitoring networks. Special weight is given to presenting the different technical concepts, the accuracy of different sensor types, addresses calibration issues and retrieval aspects.
Book Synopsis Differential Absorption Lidars for Remote Sensing of Atmospheric Pressure and Temperature Profiles by :
Download or read book Differential Absorption Lidars for Remote Sensing of Atmospheric Pressure and Temperature Profiles written by and published by . This book was released on 1995 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723825002 Total Pages :44 pages Book Rating :4.8/5 (25 download)
Book Synopsis Design of Advanced Atmospheric Water Vapor Differential Absorption Lidar (Dial) Detection System by : National Aeronautics and Space Adm Nasa
Download or read book Design of Advanced Atmospheric Water Vapor Differential Absorption Lidar (Dial) Detection System written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-19 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of atmospheric water vapor is very important for understanding the Earth's climate and water cycle. The lidar atmospheric sensing experiment (LASE) is an instrument designed and operated by the Langley Research Center for high precision water vapor measurements. The design details of a new water vapor lidar detection system that improves the measurement sensitivity of the LASE instrument by a factor of 10 are discussed. The new system consists of an advanced, very low noise, avalanche photodiode (APD) and a state-of-the-art signal processing circuit. The new low-power system is also compact and lightweight so that it would be suitable for space flight and unpiloted atmospheric vehicles (UAV) applications. The whole system is contained on one small printed circuit board (9 x 15 sq cm). The detection system is mounted at the focal plane of a lidar receiver telescope, and the digital output is read by a personal computer with a digital data acquisition card.Refaat, Tamer F. and Luck, William S., Jr. and DeYoung, Russell J.Langley Research CenterATMOSPHERIC MOISTURE; WATER VAPOR; DESIGN ANALYSIS; DIFFERENTIAL ABSORPTION LIDAR; DETECTION; AVALANCHES; SENSITIVITY; LOW NOISE; PHOTODIODES; SIGNAL PROCESSING; PRINTED CIRCUITS; LOW WEIGHT; SIGNAL TO NOISE RATIOS; ATMOSPHERIC SOUNDING
Book Synopsis Evaluation of Tropospheric Water Vapor Profiling Using Eye-safe, Infrared Differential Absorption Lidar by :
Download or read book Evaluation of Tropospheric Water Vapor Profiling Using Eye-safe, Infrared Differential Absorption Lidar written by and published by . This book was released on 1996 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous, high quality profiles of water vapor, free of systematic bias, and of moderate temporal and spatial resolution are fundamental to the success of the ARM CART program. In addition, these should be acquired over long periods at low operational and maintenance cost. The development and verification of realistic climate model parameterizations for clouds and net radiation balance, and the correction of other CART site sensor observations for interferences due to the presence of water vapor are critically dependent on water vapor profile measurements. To date, application of profiles have been limited by vertical resolution and uniqueness and high operating cost, or diminished daytime performance, lack of eye-safety, and high maintenance cost. Recent developments in infrared laser and detector technology make possible compact IR differential absorption lidar (DIAL) systems at eye-safe wavelengths. In the studies reported here, we develop DIAL system performance models and examine the potential of solving some of the shortcomings of previous methods using parameters representative of current technologies. These simulations are also applied to determine the strengths and weaknesses unique to the DIAL method for this application.
Book Synopsis Airborne differential absorption lidar for water vapour measurements in the upper troposphere and lower startosphere in the spectral region around 940 nm by : Gorazd Poberaj
Download or read book Airborne differential absorption lidar for water vapour measurements in the upper troposphere and lower startosphere in the spectral region around 940 nm written by Gorazd Poberaj and published by . This book was released on 2000 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Airborne Differential Absorption Lidar for Water Vapour Measurements in the Upper Troposphere and Lower Stratosphere in the Spectral Region Around 940 Nm by : Gorazd Poberaj
Download or read book Airborne Differential Absorption Lidar for Water Vapour Measurements in the Upper Troposphere and Lower Stratosphere in the Spectral Region Around 940 Nm written by Gorazd Poberaj and published by . This book was released on 2001 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Airborne Differential Absorption Lidar for Water Vapour Measurements in the Upper Troposphere and Lower Stratosphere in the Spectral Region Around 940 Nm by : Gorazd Poberaj
Download or read book Airborne Differential Absorption Lidar for Water Vapour Measurements in the Upper Troposphere and Lower Stratosphere in the Spectral Region Around 940 Nm written by Gorazd Poberaj and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ti:sapphire laser, optical parametric oscillator, injection seeding, LIDAR, DIAL, water vapour, potential vorticity streamer, stratospheric intrusion.
Book Synopsis Design of Advanced Atmospheric Water Vapor Differential Absorption Lidar (DIAL) Detection System by : Tamer F. Refaat
Download or read book Design of Advanced Atmospheric Water Vapor Differential Absorption Lidar (DIAL) Detection System written by Tamer F. Refaat and published by . This book was released on 1999 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of atmospheric water vapor is very important for understanding the Earth's climate and water cycle. The lidar atmospheric sensing equipment (LASE) is an instrument designed and operated by Langley Research Center for high precision water vapor measurements. The design details of a new water vapor lidar detection system that improves the measurement sensitivity of the LASE instrument by a factor of 10 are discussed. The new system consists of an advanced, very low noise, avalanche photodiode (APD) and a state-of-the-art signal processing unit. The new low-power system is also compact and lightweight so that it would be suitable for space flight and unpiloted atmospheric vehicles (UAV) applications. The whole system is contained on one small printed circuit board (9 by 15 cm[squared]). The detection system is mounted at the focal plane of a lidar receiver telescope, and the digital output is read by a personal computer with a digital data acquisition card.
Book Synopsis Differential Absorption Lidar Measurements of Atmospheric Water Vapor Using a Pseudonise Code Modulated AIGaAs Laser by : Jonathan Andrew Reily Rall
Download or read book Differential Absorption Lidar Measurements of Atmospheric Water Vapor Using a Pseudonise Code Modulated AIGaAs Laser written by Jonathan Andrew Reily Rall and published by . This book was released on 1993 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Vapor Profiling Using a Compact Widely Tunable Diode Laser Differential Absorption Lidar (DIAL) by : Amin Reza Nehrir
Download or read book Water Vapor Profiling Using a Compact Widely Tunable Diode Laser Differential Absorption Lidar (DIAL) written by Amin Reza Nehrir and published by . This book was released on 2008 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric water vapor is an important driver of cloud formation, precipitation, and cloud microphysical structure. Changes in the cloud microphysical structure due to the interaction of aerosols and water vapor can produce more reflective clouds, resulting in more incoming solar radiation being reflected back into space, leading to an overall negative radiative forcing. Water vapor also plays an important role in the atmospheric feedback process that acts to amplify the positive radiative forcing resulting from increasing levels of atmospheric CO2. In the troposphere, where the water vapor greenhouse effect is most important, the situation is harder to quantify. A need exists for tools that allow for high spatial resolution range resolved measurements of water vapor number density up to about 4 km. One approach to obtaining this data within the boundary layer is with the Differential Absorption Lidar (DIAL) that is being developed at Montana State University. A differential absorption lidar (DIAL) instrument for automated profiling of water vapor in the lower troposphere has been designed, tested, and is in routine operation. The laser transmitter for the DIAL instrument uses a widely tunable external cavity diode laser (ECDL) to injection seed two cascaded semiconductor optical amplifiers (SOA) to produce a laser transmitter that accesses the 824-841 nm spectral range. The DIAL receiver utilizes a 28-cm-diameter Schmidt-Cassegrain telescope, an avalanche photodiode (APD) detector, and a narrow band optical filter to collect, discriminate, and measure the scattered light. A technique of correcting for the wavelength-dependent incident angle upon the narrow band optical filter as a function of range has been developed to allow accurate water vapor profiles to be measured down to 225 m above the surface. Data comparisons using the DIAL instrument and co-located radiosonde measurements are presented demonstrating the capabilities of the DIAL instrument.
Book Synopsis Differential Absorption Lidar for Water Vapour in the Atmosphere by : Kwang-Ho Bae
Download or read book Differential Absorption Lidar for Water Vapour in the Atmosphere written by Kwang-Ho Bae and published by . This book was released on 2002 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Differential Absorption Lidar Measurements of Atmospheric Water Vapor Using a Pseudonoise Code Modulated AlGaAs Laser by :
Download or read book Differential Absorption Lidar Measurements of Atmospheric Water Vapor Using a Pseudonoise Code Modulated AlGaAs Laser written by and published by . This book was released on 1994 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis In Situ Correlative Measurements for the Ultraviolet Differential Absorption Lidar and the High Spectral Resolution Lidar Air Quality Remote Sensors: 1980 PEPE/NEROS Program by :
Download or read book In Situ Correlative Measurements for the Ultraviolet Differential Absorption Lidar and the High Spectral Resolution Lidar Air Quality Remote Sensors: 1980 PEPE/NEROS Program written by and published by . This book was released on 1981 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
