Download or read book Laser Ceilometers written by Eugene Y. Moroz and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of test and evaluation of two laser ceilometers, by AFCRL, are presented and discussed. A test program was initiated in 1970 to evaluate the applicability of lasers to determine cloud height for navigational guidance. The approach was to study the characteristics of laser ceilometers, and to determine how the cloud return data obtained from these systems compare with data generated by the standard Air Force rotating beam ceilometer (RBC). Two laser ceilometers were tested. One was a ruby system manufactured by ASEA of Sweden, and the other was a prototype eye-safe erbium lidar developed by the American Optical Corporation, Framingham, Massachusetts. Data comparisons show that lidars produce the same type of cloud height information as the RBC. The lidars tested have a significantly greater ranging capability than the RBC and provide more cloud structure information. It was concluded that lidars are potentially superior to the standard rotating beam ceilometer as cloud height measuring devices. (Author).
Download or read book A Novel Lidar Ceilometer written by Joshua D. Vande Hey and published by Springer. This book was released on 2014-11-19 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, a new lidar (light detection and ranging) ceilometer capable of monitoring cloud base and sensitive to boundary layer aerosols is introduced. The key to this novelty lies in its divided-lens design that addresses a classical lidar problem of balancing transmitter-receiver overlap and signal-to-noise ratio, along with a method for characterizing overlap in the laboratory. Enhanced sensitivity in the near-range of the instrument is achieved without compromising signal-to-noise in a design that is straightforward to manufacture for broad deployment. The instrument, its optical characterization, and its performance in the field are described. The prototype instrument described here has since formed the basis of a commercial sensor for monitoring clouds and aerosols. High-resolution, continuous observations of clouds and aerosols are needed to reduce the large uncertainties in our current understanding of their influence on climate that have been highlighted by the International Panel on Climate Change. And as international health organizations indicate growing public health threats over the coming decades resulting from poor air quality, extensive aerosol monitoring is required to assess personal exposure to and the health impacts of anthropogenic particulates. Ground-based optical remote sensing measurements made by well-characterized instruments, such as that described in these pages, are critical to this.
Download or read book Laser Ceilometers written by Eugene Y. Moroz and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of test and evaluation of two laser ceilometers, by AFCRL, are presented and discussed. A test program was initiated in 1970 to evaluate the applicability of lasers to determine cloud height for navigational guidance. The approach was to study the characteristics of laser ceilometers, and to determine how the cloud return data obtained from these systems compare with data generated by the standard Air Force rotating beam ceilometer (RBC). Two laser ceilometers were tested. One was a ruby system manufactured by ASEA of Sweden, and the other was a prototype eye-safe erbium lidar developed by the American Optical Corporation, Framingham, Massachusetts. Data comparisons show that lidars produce the same type of cloud height information as the RBC. The lidars tested have a significantly greater ranging capability than the RBC and provide more cloud structure information. It was concluded that lidars are potentially superior to the standard rotating beam ceilometer as cloud height measuring devices. (Author)
Download or read book Measurement of Cloud Height written by Eugene Y. Moroz and published by . This book was released on 1975 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new evaluation of a ruby lidar ceilometer was performed at AFCRL as part of a program to evaluate the applicability of lasers to determine cloud height for airfield use. Comparitive measurements of cloud height were made with a standard Air Force rotating beam ceilometer (RBC). Examination of the test results shows the lidar indicates an accurate presentation of cloud structure. The RBC cloud return is affected by its geometry and by multiple scatter in the cloud. As a result, the measurement is not a true representation of cloud structure. These effects also bias the RBC to indicate higher cloud heights. However, the difference in cloud heights as measured by the two systems is not significant. Therefore, it is concluded that the lidar is a superior cloud height measuring device and both techniques provide operationally useful indications of cloud height. (Author).
Download or read book Conference Abstracts written by and published by . This book was released on 1973 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visual Range written by Charles Alexander Douglas and published by . This book was released on 1977 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Monograph written by and published by . This book was released on 1959 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meteorological Measurement Systems written by Fred V. Brock and published by Oxford University Press. This book was released on 2001-02-08 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats instrumentation used in meteorological surface systems, both on the synoptic scale and the mesoscale, and the instrumentation used in upper air soundings. The text includes material on first- and second-order differential equations as applied to instrument dynamic performance, and required solutions are developed. Sensor physics are emphasized in order to explain how sensors work and to explore the strengths and weaknesses of each design type. The book is organized according to sensor type and function (temperature, humidity, and wind sensors, for example), though several unifying themes are developed for each sensor. Functional diagrams are used to portray sensors as a set of logical functions, and static sensitivity is derived from a sensor's transfer equation, focusing attention on sensor physics and on ways in which particular designs might be improved. Sensor performance specifications are explored, helping to compare various instruments and to tell users what to expect as a reasonable level of performance. Finally, the text examines the critical area of environmental exposure of instruments. In a well-designed, properly installed, and well-maintained meteorological measurement system, exposure problems are usually the largest source of error, making this chapter one of the most useful sections of the book.
Download or read book Instrumentation Papers written by and published by . This book was released on with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Sensors and Techniques to Automate Weather Observations written by Eugene Y. Moroz and published by . This book was released on 1977 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several sensors and techniques currently being investigated at the Air Force Geophysics Laboratory as part of its program to automate the observation of weather parameters are described. Included are a lidar cloud-height measuring system, a laser weather identifier, a decision tree approach for determination of present weather, a lidar slant visual range measuring system, and a tower mounted visibility meter approach for determination of slant visual range. (Author)
Download or read book Air Force Surveys in Geophysics written by and published by . This book was released on 1975 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Official Gazette of the United States Patent and Trademark Office written by and published by . This book was released on 1985 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Federal Plan for Meteorological Services and Supporting Research written by and published by . This book was released on 1992 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Federal Plan for Meteorological Services and Supporting Research written by United States. Office of Federal Coordinator for Meteorological Services and Supporting Research and published by . This book was released on 1993 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey of Sensors for Automated Tactical Weather Observations written by Eugene Y. Moroz and published by . This book was released on 1980 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current requirements for tactical weather systems at fixed and bare- base airfields necessitate an upgrading of meteorological sensor capability, system automation, and a range of data dissemination options. A program has been initiated at the Air Force Geophysics Laboratory to implement these objectives. In the first phase of this program, a survey of the state-of-the-art has been made for the identification of equipment suitable for such a system. Government inventoried instrumentation, as well as those from commercial sources, have been considered. Criteria to be used in sensor selection will include both accuracy and the ability to operate trouble free over a wide range of environmental extremes. When appropriate, in-house programs will be initiated to correct deficiencies. During the coming year, field tests and intercomparisons will be made of selected sensors. Instrumentation will eventually be integrated into an automated system with local and/or remote display of weather elements tailored to user requirements.
Download or read book Measurement and Safety written by Béla G. Lipták and published by CRC Press. This book was released on 2016-11-25 with total page 3643 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Instrument and Automation Engineers’ Handbook (IAEH) is the #1 process automation handbook in the world. Volume one of the Fifth Edition, Measurement and Safety, covers safety sensors and the detectors of physical properties. Measurement and Safety is an invaluable resource that: Describes the detectors used in the measurement of process variables Offers application- and method-specific guidance for choosing the best measurement device Provides tables of detector capabilities and other practical information at a glance Contains detailed descriptions of domestic and overseas products, their features, capabilities, and suppliers, including suppliers’ web addresses Complete with 163 alphabetized chapters and a thorough index for quick access to specific information, Measurement and Safety is a must-have reference for instrument and automation engineers working in the chemical, oil/gas, pharmaceutical, pollution, energy, plastics, paper, wastewater, food, etc. industries. About the eBook The most important new feature of the IAEH, Fifth Edition is its availability as an eBook. The eBook provides the same content as the print edition, with the addition of thousands of web addresses so that readers can reach suppliers or reference books and articles on the hundreds of topics covered in the handbook. This feature includes a complete bidders' list that allows readers to issue their specifications for competitive bids from any or all potential product suppliers.
