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Advanced Water Vapor Lidar Detection System
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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 Characterization of Advanced Avalanche Photodiodes for Water Vapor Lidar Receivers by : Tamer F. Refaat
Download or read book Characterization of Advanced Avalanche Photodiodes for Water Vapor Lidar Receivers written by Tamer F. Refaat and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 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.
Book Synopsis Advanced atmospheric water vapor DIAL detection system by :
Download or read book Advanced atmospheric water vapor DIAL detection system written by and published by DIANE Publishing. This book was released on with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of advanced avalanche photodiodes for water vapor lidar receivers by :
Download or read book Characterization of advanced avalanche photodiodes for water vapor lidar receivers written by and published by DIANE Publishing. This book was released on with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723819582 Total Pages :64 pages Book Rating :4.8/5 (195 download)
Book Synopsis Characterization of Advanced Avalanche Photodiodes for Water Vapor Lidar Receivers by : National Aeronautics and Space Adm Nasa
Download or read book Characterization of Advanced Avalanche Photodiodes for Water Vapor Lidar Receivers written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-19 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Advanced Atmospheric Water Vapor DIAL Detection System by : Tamer F. Refaat
Download or read book Advanced Atmospheric Water Vapor DIAL Detection System written by Tamer F. Refaat and published by DIANE Publishing. This book was released on 2000 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Characterization of Advanced Avalanche Photodiodes for Water Vapor Lidar Receivers by : Tamer F. Refaat
Download or read book Characterization of Advanced Avalanche Photodiodes for Water Vapor Lidar Receivers written by Tamer F. Refaat and published by DIANE Publishing. This book was released on 2000 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA Langley Scientific and Technical Information Output: 1999 by :
Download or read book NASA Langley Scientific and Technical Information Output: 1999 written by and published by . This book was released on 2000 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research by :
Download or read book Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research written by and published by . This book was released on 1999 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photoelectric Detection on Derived Attributes of Targets by : Xing Yang
Download or read book Photoelectric Detection on Derived Attributes of Targets written by Xing Yang and published by Springer Nature. This book was released on 2023-08-22 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the novel photoelectric detection technique on derived attributes of targets. Photoelectric detection on derived attributes of targets is a new target detection and monitoring method. It is achieved by acquiring three types of attributes of the target, including those that reflect the essential features of parts of the target, those directly generated from the target, and those synthesized by the target features. The book introduces the classification of derived attributes of targets and describes typical detection methods. Emphases are put on laser detection of aerial moving targets, using derived attributes such as the disturbance of atmospheric wind fields, trailing vortexes, and the disturbance of atmospheric components. The authors also elaborate on visible light imaging detection using derived attributes such as retroreflection and the identification of target carriers. Besides, the synthetic attributes processing of integrated aerospace images is introduced for the detection of targets on the ground and sea surfaces. This book can be used as a good reference for researchers engaged in the fields of photoelectric detection, target detection and image processing, and as a reference book for senior undergraduates and postgraduates in relevant majors.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2000 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Ultra Narrowband Optical Filters for Water Vapor Differential Absorption Lidar (DIAL) Atmospheric Measurements by : Ingrid Stenholm
Download or read book Ultra Narrowband Optical Filters for Water Vapor Differential Absorption Lidar (DIAL) Atmospheric Measurements written by Ingrid Stenholm and published by . This book was released on 2001 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1992 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Third Atmospheric Radiation Measurement (ARM) Science Team Meeting by :
Download or read book Proceedings of the Third Atmospheric Radiation Measurement (ARM) Science Team Meeting written by and published by . This book was released on 1994 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summaries of Papers Presented at the Conference on Lasers and Electro-optics by :
Download or read book Summaries of Papers Presented at the Conference on Lasers and Electro-optics written by and published by . This book was released on 1999 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature Control of Avalanche Photodiode Using Thermoelectric Cooler by : Tamer F. Refaat
Download or read book Temperature Control of Avalanche Photodiode Using Thermoelectric Cooler written by Tamer F. Refaat and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
