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 Atmospheric IR Transmission Data for a Temperate Maritime Environment written by D. R. Cutten and published by . This book was released on 1983 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements are reported on infrared transmission through the atmosphere at a coastal marine site in a temperate environment. Ten broadband spectral regions were used and variations of transmittance with absolute humidity and visibility over paths of 5 and 9 km investigated. All data have been compared with the predictions of the AFGL computer code LOWTRAN 5. The discrepancy reported previously between the measured and calculated data in the 4.4 to 5.4 micrometer region still exists, although new data on the water continuum absorption coefficients for this region have reduced this. Reasonable agreement has been shown to exist in the 8 to 12 micrometer region for absolute humidities up to 12 gm/cu m. The results of the comparisons for the 1 to 2.5 micrometer region showed a greater discrepancy. Some of this discrepancy could be arising from point measurements of aerosol extinction using equipment which is underestimating the aerosol attenuation coefficient. Data on scintillation fluctuations recorded during the transmittance measurements are also presented.
Download or read book Atmospheric IR Transmission Measurements in a Tropical Maritime Environment Comparison with the LOWTRAN 6 Model written by and published by . This book was released on 1985 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadband IR transmission data measured at a coastal, tropical maritime site have been compared with LOWTRAN 6 model predictions. Transmittance data for a 7 km path plotted as a function of absolute humidity have been examined in six spectral regions from 1.5 to 12 micrometers. A significant discrepancy, which increases with water vapour content, has been found between the measured and predicted data for the 8 to 12 micrometer region. This discrepancy is believed to be due to errors in the laboratory-determined self- broadening coefficients of water continuum absorption. Reasonable agreement has been obtained in the 4.4 to 5.4 micrometer and the 3.5 to 4.0 micrometer regions, particularly for the former region when water continuum absorption is included in the LOWTRAN model.
Download or read book The Measurement of Atmospheric Transmittance from Sun and Sky with an Infrared Vertical Sounder written by William Lee Smith and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the determination of atmospheric transmittance from ground-based sun and sky radiance measurements with a prototype of the Nimbus E Infrared Temperature Profile Radiometer (ITPR).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmosphere IR Transmission Measurements in a Tropical Maritime Environment Comparison with the LOWTRAN 6 Model written by D. R. Cutten and published by . This book was released on 1985 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric IR Transmission Data for a Temperate Maritime Environment written by and published by . This book was released on 1900 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Infrared Atmospheric Transmission written by John N. Howard and published by . This book was released on 1961 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Influence of Atmospheric Transmission of Functions on Infrared Measurements in Planetary Atmospheres written by Irmhild Tannhäuser and published by . This book was released on 1967 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scattering and Propagation in Random Media written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Electromagnetic Wave Propagation Panel. Specialists' Meeting and published by . This book was released on 1988 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of scattering and propagation in random media is one that has implications for the design, development and operation of most military systems that radiate energy as a means of accomplishing their funtion. Primary emphasis is on scattering and transmission in the atmosphere; however, other related random medium effects are not excluded. Modern methods of characterizing random media, mathematical methods and their applicability, effects on electromagnetic waves and the interpretation of these effects to specific system applications are described. The region of the spectrum considered is essentially unlimited and ranges from very long waves to optics. The performance of existing surveillance communication and navigation systems as well as the design of future systems is influenced by the propagation of energy via random media. An understanding of the nature of the medium and its impact on system design and performance is essential to the NATO community.
Download or read book Environmental Errors in the Use of the Airborne Infrared Radiation Thermometer to Measure Sea surface Temperature written by Robert W. S. Christenson and published by . This book was released on 1964 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: An airborne infrared radiation thermometer (IRT) used to measure the sea-surface temperature is described, and the basic radiation principles on which the operation of the instrument depends are discussed. The environmental factors which may tend to introduce errors into the measurement of sea-surface temperature by the IRT are investigated: first by reviewing the works of some other authors; secondly by empirical means using field data supplied by the U.S. Naval Oceanographic Office and the Sandy Hook Marine Laboratory. The empirical results indicate that absorption and emission of infrared energy by atmospheric water vapor are the important physical phenomena which cause IRT error. The results suggest that with increasing values of the combination of sea level mixing ratio and air temperature, IRT error decreases. An attempt is made to explain these results on the basis of radiation principles previously described. (Author).
Download or read book Optical Radiometry for Ocean Climate Measurements written by and published by Academic Press. This book was released on 2014-11-13 with total page 723 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art of optical remote sensing applied for the generation of marine climate-quality data products, with contributions by international experts in the field. The chapters are logically grouped into six thematic parts, each introduced by a brief overview. The different parts include: i. requirements for the generation of climate data records from satellite ocean measurements and additionally basic radiometry principles addressing terminology, standards, measurement equation and uncertainties; ii. satellite visible and thermal infrared radiometry embracing instrument design, characterization and, pre- and post-launch calibration; iii. in situ visible and thermal infrared radiometry including overviews on basic principles, technology and measurements methods required to support satellite missions devoted to climate change investigations; iv. simulations as fundamental tools to support interpretation and analysis of both in situ and satellite radiometric measurements; v. strategies for in situ radiometry to satisfy mission requirements for the generation of climate data records; and finally, vi. methods for the assessment of satellite data products. Fundamentals of measurement theory are taken through to implementation of practical ground based radiometers and their application to validate satellite data used to generate climate data records. This book presents practical solutions for those involved or contemplating the validation of optical climate measurements from satellite instruments. Exhaustive coverage of important topics Fundamental and advanced discussions of many types of instruments Emphasis on calibration and uncertainty analysis of results
Download or read book Reeds Introductions Principles of Earth Observation for Marine Engineering Applications written by Christopher Lavers and published by Bloomsbury Publishing. This book was released on 2019-09-19 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential, introductory text for marine engineering students covering the fundamental earth-observation concepts that underpin all space-based terrestrial and maritime remote sensing methods. Satellite-based earth observation provides key weather and environmental information to all nations, including key maritime users such as navy, coastguard and merchant vessels. The application and understanding of electromagnetic wave-based devices and sensors is an established merchant sea service requirement, found in the Standards in Training and Certification in Watchkeeping (STCW95) qualification and various Maritime Coastguard Agency exams. It is vital that maritime and land-based users have a basic understanding of the concepts upon which these essential earth-observation systems now operate. The book is written as simply as possible to support the growing numbers of overseas students for whom English is not their first language. It provides a firm foundation prior to reading and studying of the Reeds Marine Engineering series, and is complementary to other volumes in the Introductions series. Maritime and land-based students and scientists having read this easy-to-read volume will be better prepared for more in-depth study.
Download or read book Signal Processing of Data from Infrared Radiation Transmission Through the Atmospheric Marine Surface Layer written by David DeWaine Wallin and published by . This book was released on 1997 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991 with total page 1530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements of Trace Constituents from Atmospheric Infrared Emission and Absorption Spectra a Feasibility Study written by and published by . This book was released on 1974 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Protection Research Catalog Indexes written by Smithsonian Science Information Exchange and published by . This book was released on 1972 with total page 1478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
