Selected bibliography of remote sensing

Bibliography of remote sensing techniques for analysis and assimilation of geographic dat

Quantitative assessment of emergent biomass and species composition in tidal wetlands using remote sensing

There are no author-identified significant results in this report

Digital Color Imaging

This paper surveys current technology and research in the area of digital color imaging. In order to establish the background and lay down terminology, fundamental concepts of color perception and measurement are first presented us-ing vector-space notation and terminology. Present-day color recording and reproduction systems are reviewed along with the common mathematical models used for representing these devices. Algorithms for processing color images for display and communication are surveyed, and a forecast of research trends is attempted. An extensive bibliography is provided

A study of gravure cell structure generated by the Hell Chromagraph 399 ER laser scanner onto a photopolymer plastic gravure printing surface

It is known that the gravure process provides the best quality printed materials and the fastest production speed. The gravure process, as a matter of fact, is the only process which can utilize fully digital imaging technology. For instance, the Helio-Klischograph Model K201 and K202 incorporated with the Hell Chromacom System can engrave gravure cylinders directly without using any halftone films or bromides. Hell Co., Ltd., moreover, has been developing the electron beam engraving technique which employs digital imaging technology to engrave gravure cylinders. On the other hand, Crosfield Electronics Co., Ltd. introduced the Lasergravure process which also utilizes digital imaging technology to engrave gravure cylinders. However, these techniques represent very high costs for gravure printers. Only large companies can afford such investments. The gravure process, generally speaking, is the most expensive process, mainly due to the costs of printing cylinder preparation. To compensate for costly prepress, it is therefore used for high production runs. This constraint is the main disadvantage of the gravure process and has caused the gravure market to become smaller than its competitors web offset and flexography. Research in web offset and flexo has been successful in developing higher print quality, faster production speed and lower costs. Therefore, there are some companies which have been developing a method of making photopolymer-coated cylinders for gravure to reduce, not only the costs of the metal cylinders and the sophisticated equipment, but also the production time. The company that provided photopolymer material for this thesis claimed that its products can be commercially made as gravure cylinders. This photopolymer can be imaged by a conventional ultraviolet fluorescent lamp. Both the company and the author agreed that it might be feasible to utilize digital imaging technology to image this photopolymer. The author selected the Hell Chromagraph 399 ER Laser Scanner as a digital imaging source to image onto this photopolymer. After enormous efforts in the experiments, the argon ion laser on the Hell 399 ER was not able to image onto this photopolymer regardless of the laser intensity and the length of the exposure time because the spectral sensitivity of this photopolymer did not match the argon ion laser. The author, however, conducted further experiments to prove that this photopolymer can be imaged by a high-power UV-argon ion laser, but it is, at present, impractical for gravure printers. Some recommendations for further studies in this area are suggested

Teachers guide for building and operating weather satellite ground stations for high school science

A number of colleges and universities are operating APT direct readout stations. However, high school science teachers have often failed to realize the potential of meteorological satellites and their products as unique instructional tools. The ability to receive daily pictures from these satellites offers exciting opportunities for secondary school teachers and students to assemble the electronic hardware and to view real time pictures of Earth from outer space. The station and pictures can be used in the classroom to develop an approach to science teaching that could span many scientific disciplines and offer many opportunities for student research and participation in scientific processes. This can be accomplished with relatively small expenditures of funds for equipment. In most schools some of the equipment may already be available. Others can be constructed by teachers and/or students. Yet another source might be the purchase of used equipment from industry or through the government surplus channels. The information necessary for individuals unfamiliar with these systems to construct a direct readout for receiving real time APT photographs on a daily basis in the classroom is presented

A study to analyze six band multispectral images and fabricate a Fourier transform detector

An automatic Fourier transform diffraction pattern sampling system, used to investigate techniques for forestry classification of six band multispectral aerial photography is presented. Photographs and diagrams of the design, development and fabrication of a hybrid optical-digital Fourier transform detector are shown. The detector was designed around a concentric ring fiber optic array. This array was formed from many optical fibers which were sorted into concentric rings about a single fiber. All the fibers in each ring were collected into a bundle and terminated into a single photodetector. An optical/digital interface unit consisting of a high level multiplexer, and an analog-to-digital amplifier was also constructed and is described

The relevance of ERTS-1 data to the state of Ohio

There are no author-identified significant results in this report

Investigation of light source and scattering medium related to vapor-screen flow visualization in a supersonic wind tunnel

Methods for increasing the radiant in light sheets used for vapor screen set-ups were investigated. Both high-pressure mercury arc lamps and lasers were considered. Pulsed operation of the air-cooled 1-kW lamps increased the light output but decreased reliability. An ellipsoidal mirror improved the output of the air-cooled lamps by concentrating the light but increased the complexity of the housing. Water-cooled-4-kW lamps coupled with high-aperture Fresnel lenses provided reasonable improvements over the air-cooled lamps. Fanned laser beams measurements of scattered light versus dew point made in conjunction with successful attempts to control the fluid injection. A number of smoke generators are described and test results comparing smoke and vapor screens are shown. Finally, one test included a periscope system to relay the image to a camera outside the flow

Quarterly literature review of the remote sensing of natural resources

The Technology Application Center reviewed abstracted literature sources, and selected document data and data gathering techniques which were performed or obtained remotely from space, aircraft or groundbased stations. All of the documentation was related to remote sensing sensors or the remote sensing of the natural resources. Sensors were primarily those operating within the 10 to the minus 8 power to 1 meter wavelength band. Included are NASA Tech Briefs, ARAC Industrial Applications Reports, U.S. Navy Technical Reports, U.S. Patent reports, and other technical articles and reports