Download or read book Atmospheric Transmission Measurement System written by Southwestern at Memphis. Department of Physics. Laboratory of Atmospheric and Optical Physics and published by . This book was released on 1965 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atmospheric Transmission Measurement Program Report for L July Through 30 September 1976 TQ 1976 written by T. H. Cosden and published by . This book was released on 1977 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A facility has been completed to measure atmospheric transmission by combining measurement techniques based on laser-line extinction, high-resolution Fourier spectroscopy, and gas filter correlation spectroscopy. Essential features of this measurement system are described, and initial measurements are presented of 0.1/cm-resolution atmospheric transmission using a 5-km overwater path at the Patuxent River Naval Air Station, Patuxent River, Maryland. Concurrent absolute transmission measurements at several DF laser wavelengths between 3.6 and 4.1 micrometers have been used to provide absolute transmission calibrations for the spectra. (Author).

Download or read book Instrumentation and Remote Control System for Ground to air Atmospheric Transmission Measurements written by R. Rudkin and published by . This book was released on 1959 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atmospheric Transmission Measurement 1 written by and published by . This book was released on 1973 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel method for improving the performance of laser communication links through a turbulent atmosphere, called 'fast tracking, ' has been demonstrated experimentally in the laboratory to be both theoretically sound and practicable. Also, a design has been prepared for an atmospheric transmission measurement (ATM) system suitable for use at field sites for evaluation of atmospheric turbulence effects on ground-to-space laser communication links. The ATM system makes use of a fast-response (1 msec) star tracker and image intensity sensor; it is relatively simple and economical to use because neither flight hardware nor flight operations is involved, and it is capable of day or night operation. A field measurement plan is presented that is designed to aid in the selection of laser transmitter sites and to indicate the performance of ground-to-space links using those sites. Because the concept of optical antenna gain reciprocity is central to both the fast-tracking technique and to the ATM system, an initial experimental objective of the program was to test this theory. The key test was conducted over a 450-ft outdoor path using two laser- transmitter/pinhole-receiver units directed toward one another. To provide quantitative criteria for the design of the experiments, the reciprocity theory was reviewed in detail and was extended to cover the quasicoherent pinhole- detector receiver using a pinhole of finite size. Boresight requirements also were derived for a fast-tracking transmitter.

Download or read book Measurement of Atmospheric Transmission Using Backscatter from a Pulsed Light Separated System written by MELVIN H. HORMAN and published by . This book was released on 1959 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atmospheric Transmission Measurements Using IR Lasers Fourier Transform Spectroscopy and Gas Filter Correlation Techniques written by J. Dowling and published by . This book was released on 1977 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive measurement system for atmospheric transmission field experiments is described with emphasis on the recent additions of a high resolution, scanning, Fourier interferometer system and a gas filter correlation spectrometer. Results obtained from three concurrent experiments used to generate a data base appropriate to high resolution transmission model validation are displayed. Laser extinction data, high resolution, long path atmospheric transmission spectra, and path integrated water vapor measurements are reported and discussed. Plans for future field experiments utilizing these three measurement techniques plus broadband infrared transmissometer and infrared target signature measurement are discussed.

Download or read book Atmospheric Transmission Measurement Program and Field Test Plan written by Naval Research Laboratory (U.S.). Optical Radiation Branch and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: An atmospheric measurement program combining laser-line-extinction, Fourier-spectroscopy, and gas-filter-correlation-spectrometer experiments is described. A brief summary of the NRL experimental propagation effort since 1970 is presented followed by an abbreviated discussion of the current status of linear propagation modeling. Objectives of the current NRL atmospheric transmission program are stated. An experimental field test plan is presented followed by detailed information contained in several appendixes concerning procedures and facilities for laser-line-extinction measurements and calibrations, scanning-Michelson-interferometer experiments, gas-filter-correlation-spectrometer measurements, meteorological and aerosol data acquisition, and on-site data processing. Information concerning project staffing and a schedule for preparation and performance of a field experiment to be carried out at the Patuxent Naval Air Station, Patuxent River, Md., are contained in two final appendixes. (Author).

Download or read book Atmospheric Transmission and Particle Size Measurements Proceedings of Workshop 23 25 October 1979 Dayton Ohio written by John F. Myers and published by . This book was released on 1980 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: A highly accurate description of the atmosphere in terms of its transmission and aerosol size distribution is needed to quantify the performance of various DOD reconnaissance and weapons targeting systems. Recent DOD measurement programs have produced inconsistent data sets. Doubt has been cast upon the accuracies and sensitiviites of current meteorological instruments which provide transmission and particle size data. The purpose of the Atmospheric Transmission and Particle Size Measurements workshop was to provide a forum for information exchange between people who have been involved in the measurements. A definition of the state of the art of present equipment and technique was obtained. An overall summary, workshop session summaries, and abstracts of presentations are included. (Author).

Download or read book Atmospheric Transmission and Weather Measurements written by Willard L. Derksen and published by . This book was released on 1953 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the NML's participation in Operation TUMBLER-SNAPPER was to measure the transmissivity of the atmosphere and to obtain the temperature, humidity and other weather data which are pertinent in evaluating the results of experiments concerned with the effects of thermal radiation. The atmospheric attenuation of a ground level path indicated serious deviations because of atmospheric boil, dust and refraction effects. Measurement over a slant path, employing a hilltop station and approximating the path of thermal radiation from a nuclear detonation, gave reliable results. Lower transmissivities were found for ultraviolet and infrared wave lengths than for visible light and indicated the need for more complex attenuation relationships especially for spectral energy determinations. The NML transmissometer was operationally successful and was operated unattended in the area at the time of an atom bomb detonation. (Author).

Download or read book Measurement of Atmospheric Transmission Over Long Paths in the Infrared Spectral Region written by U. P. Oppenheim and published by . This book was released on 1984 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumentation built for long path spectroradiometric measurement is described. Preliminary results for atmospheric transmission over a 7 km path are reported. A comparison is made with LOWTRAN computations. (Author).

Download or read book Infrared Atmospheric Transmission Emission Measurement in a Maritime Environment written by G. J. Bishop and published by . This book was released on 1987 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is divided into two parts, the first covering atmospheric measurement trials, the second describing predictions of atmospheric effects on sensor design. In 1985 a programme of collaborative electro-optical research was agreed between ARE (Admiralty Research Establishment) and British Aerospace, co-ordinated by the Naval and Electronic Systems Division at Bristol. The object of this research was to gather trials data on the performance of electro-optical systems in a maritime environment. In order to achieve this objective, it was important to measure the atmospheric transmission/emission close to the sea surface in a variety of weather conditions. During the course of the trial (Fraser Battery October 1985) considerable experience was gained in the operation of various imaging sensors, especially in calibration and measurement techniques. The need to obtain calibration measurements of atmospheric transmission/emission between the electro-optic sensor and any trials target is to be emphasised. This paper describes how these measurements were made and compares the results to those predicted by the Lowtran V atmospheric model. The second part of this paper describes how ozone absorption will affect the design of a passive surveillance system working in the ultraviolet band. (Author).

Download or read book Transmissometer and Atmospheric transmission Studies written by D. F. Fisher and published by . This book was released on 1963 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A transmissometer capable of measuring the spectral transmission of the atmosphere in the 0.5-15-micron region is described in this final report. The major components, which include two interferometer spectrometers, a visual photometer, and two 60-inch searchlights, are described in detail. The operation of the system is discussed first component by component, and then as a complete unit. A data-reduction system is described, and also a technique for using the transmissometer data to correct missile-radiation measurements. Engineering drawings, D measurements and design calculations are presented. (Author).

Download or read book Atmospheric Contrast Transmission Measurements in Tropical Atmospheres written by Leo J. Sheehan and published by . This book was released on 1970 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the management aspects of Operation SHED LIGHT Item 95, Atmospheric Optical Measurement Program in Thailand and Puerto Rico. It discusses the background history and initial planning of the project, the execution of these plans in modifying the C-130 aircraft measurement system and in preparing the field measurement program. The report gives an account of the field trips and presents finally some of the conclusions and recommendations reached from this program. (Author).

Download or read book Report of NRL Progress written by Naval Research Laboratory (U.S.) and published by . This book was released on 1977 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atmospheric Water Vapor written by Adarsh Deepak and published by Elsevier. This book was released on 2013-09-25 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric Water Vapor contains the technical proceedings of the International Workshop on Atmospheric Water Vapor held in Vail, Colorado, on September 11-13, 1979. The papers assess the state-of-the-art in measurement, modeling, and application of atmospheric water vapor properties and highlight important problems that require further effort in order to better understand the atmosphere itself as well as the electromagnetic propagation through the atmosphere. Comprised of 39 chapters, this book begins with a discussion on the optics and spectroscopy of water vapor. Some actual spectra showing the problems specific to the water molecule are described, along with the method used to calculate precise vibration-rotation energy levels and wave functions. Atmospheric infrared transmission measurements in maritime locations are also presented. Subsequent sections explore microwave and millimeter wave phenomena; geoastrophysical applications; and in situ measurements, remote sensing, and meteorology of water vapor. The final chapters deal with the microphysics and atmospheric chemistry of water vapor. This monograph will be of interest to scientists from universities, government agencies, research laboratories, and industry.

Download or read book Atmospheric Transmission written by Robert W. Fenn and published by . This book was released on 1981 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Springer Handbook of Atmospheric Measurements written by Thomas Foken and published by Springer Nature. This book was released on 2021-11-09 with total page 1761 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical handbook provides a clearly structured, concise and comprehensive account of the huge variety of atmospheric and related measurements relevant to meteorologists and for the purpose of weather forecasting and climate research, but also to the practitioner in the wider field of environmental physics and ecology. The Springer Handbook of Atmospheric Measurements is divided into six parts: The first part offers instructive descriptions of the basics of atmospheric measurements and the multitude of their influencing factors, fundamentals of quality control and standardization, as well as equations and tables of atmospheric, water, and soil quantities. The subsequent parts present classical in-situ measurements as well as remote sensing techniques from both ground-based as well as airborn or satellite-based methods. The next part focusses on complex measurements and methods that integrate different techniques to establish more holistic data. Brief discussions of measurements in soils and water, at plants, in urban and rural environments and for renewable energies demonstrate the potential of such applications. The final part provides an overview of atmospheric and ecological networks. Written by distinguished experts from academia and industry, each of the 64 chapters provides in-depth discussions of the available devices with their specifications, aspects of quality control, maintenance as well as their potential for the future. A large number of thoroughly compiled tables of physical quantities, sensors and system characteristics make this handbook a unique, universal and useful reference for the practitioner and absolutely essential for researchers, students, and technicians.