Design Of Advanced Atmosphere Water Vapor Differential Absorption Lidar Dial Detection System Nasa Tp 1999 209348 August 6 1999
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Design Of Advanced Atmosphere Water Vapor Differential Absorption Lidar Dial Detection System Nasa Tp 1999 209348 August 6 1999
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Author :
language : en
Publisher:
Release Date : 1999*
Design Of Advanced Atmosphere Water Vapor Differential Absorption Lidar Dial Detection System Nasa Tp 1999 209348 August 6 1999 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999* with categories.
Design Of Advanced Atmospheric Water Vapor Differential Absorption Lidar Dial Detection System
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Author : Tamer F. Refaat
language : en
Publisher:
Release Date : 1999
Design Of Advanced Atmospheric Water Vapor Differential Absorption Lidar Dial Detection System written by Tamer F. Refaat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Optical radar categories.
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.
Design Of Advanced Atmospheric Water Vapor Differential Absorption Lidar Dial Detection System
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-09-19
Design Of Advanced Atmospheric Water Vapor Differential Absorption Lidar Dial Detection System written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-19 with Science categories.
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
Simulator Study Of Stall Post Stall Characteristics Of A Fighter Airplane With Relaxed Longitudinal Static Stability
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Author :
language : en
Publisher:
Release Date : 1979
Simulator Study Of Stall Post Stall Characteristics Of A Fighter Airplane With Relaxed Longitudinal Static Stability written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.
Analysis Of Partly Wrinkled Membranes
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Author : Manuel Stein
language : en
Publisher:
Release Date : 1961
Analysis Of Partly Wrinkled Membranes written by Manuel Stein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with Mathematical analysis categories.
A Theory For Inflated Thin Wall Cylindrical Beams
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Author : W. B. Fichter
language : en
Publisher:
Release Date : 1966
A Theory For Inflated Thin Wall Cylindrical Beams written by W. B. Fichter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Bending categories.
Advanced Atmospheric Water Vapor Dial Detection System
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Author :
language : en
Publisher: DIANE Publishing
Release Date :
Advanced Atmospheric Water Vapor Dial Detection System written by and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Advanced Atmospheric Water Vapor Dial Detection System
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Author : Tamer F. Refaat
language : en
Publisher:
Release Date : 2000
Advanced Atmospheric Water Vapor Dial Detection System written by Tamer F. Refaat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Radar categories.
This thesis describes the design and validation of this new water vapor DIAL detection system which was integrated onto a small Printed Circuit Board (PCB) with minimal weight and power consumption. Comparing its measurements to an existing DIAL system for aerosol and water vapor profiling validated the detection system.
Characterization Of Advanced Avalanche Photodiodes For Water Vapor Lidar Receivers
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-09-19
Characterization Of Advanced Avalanche Photodiodes For Water Vapor Lidar Receivers written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-19 with Science categories.
Development of advanced differential absorption lidar (DIAL) receivers is very important to increase the accuracy of atmospheric water vapor measurements. A major component of such receivers is the optical detector. In the near-infrared wavelength range avalanche photodiodes (APD's) are the best choice for higher signal-to-noise ratio, where there are many water vapor absorption lines. In this study, characterization experiments were performed to evaluate a group of silicon-based APD's. The APD's have different structures representative of different manufacturers. The experiments include setups to calibrate these devices, as well as characterization of the effects of voltage bias and temperature on the responsivity, surface scans, noise measurements, and frequency response measurements. For each experiment, the setup, procedure, data analysis, and results are given and discussed. This research was done to choose a suitable APD detector for the development of an advanced atmospheric water vapor differential absorption lidar detection system operating either at 720, 820, or 940 nm. The results point out the benefits of using the super low ionization ratio (SLIK) structure APD for its lower noise-equivalent power, which was found to be on the order of 2 to 4 fW/Hz(sup (1/2)), with an appropriate optical system and electronics. The water vapor detection systems signal-to-noise ratio will increase by a factor of 10.Refaat, Tamer F. and Halama, Gary E. and DeYoung, Russell J.Langley Research CenterDIFFERENTIAL ABSORPTION LIDAR; ATMOSPHERIC MOISTURE; AVALANCHE DIODES; MOISTURE METERS; PHOTODIODES; RADAR RECEIVERS; WATER VAPOR; CHARACTERIZATION; RADAR MEASUREMENT; FREQUENCY RESPONSE; IONIZATION; NOISE REDUCTION; SIGNAL TO NOISE RATIOS; ELECTRIC POTENTIAL; NOISE MEASUREMENT
Characterization Of Advanced Avalanche Photodiodes For Water Vapor Lidar Receivers
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Author : Tamer F. Refaat
language : en
Publisher: DIANE Publishing
Release Date : 2000
Characterization Of Advanced Avalanche Photodiodes For Water Vapor Lidar Receivers written by Tamer F. Refaat and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.