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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,621 records · Page 90
All sourcesNASA NTRSDOE OSTI
NASA NTRS1976

Detection and mapping of mineralized areas in the Cortez-Uinta Belt, Utah-Nevada using computer-enhanced ERTS imagery

The author has identified the following significant results. The reflectance spectra of most hydrothermally altered rocks were characterized by broad ferric iron absorption bands short of 1.1 microns and a sharper hydroxyl band near 2.2 microns; maximum reflectance occurred near 1.6 microns. Their features became more prominent as albedo increased. The MSS color ratio composite images were the most effective and practical means for detecting and mapping limonitic rocks in areas having less than about 50 percent desert brush cover and less than 25-35 percent coniferous tree cover. Limonitic altered and unaltered rocks could not be distinguished in MSS color ratio composite images.

Rowan, L. C.↗
NASA NTRS1976

Tectonic structure of Alaska as evidenced by ERTS imagery and ongoing seismicity

The author has identified the following significant results. At least three seismically active faults were identified which had not been previously mapped. One of these passes near the proposed site of a hydroelectric project on the Susitna River. Evidence of the state's past deformational history was obtained, indicating that right lateral offset has occurred sequentially from the northern part of the state to the southern. An apparent fault passes near Fairbanks, and is presumably the source of much seismic activity in the area.

Gedney, L. D.↗
NASA NTRS1977

LANDSAT (ERTS) used as a basis for geological volcanological mapping in the central Andes

LANDSAT images of the central Andes (N-Chile, W-Bolivia) were effectively used for volcanological mapping of an area about 160,000 km. The map shown exhibits more and better details than the older small scale geological maps of that area. Even on a scale of 1:1,000,000 details greater than 200 m in size are recognizable. The interpretation of LANDSAT images makes it possible to establish relative age sequences of strato-volcanoes. Finally, the images will also be helpful in prospecting for mineral deposits and geothermal sources.

Kussmaul, S.↗
NASA NTRS1977

Overall evaluation of LANDSAT (ERTS) follow on imagery for cartographic application

The author has identified the following significant results. LANDSAT imagery can be operationally applied to the revision of nautical charts. The imagery depicts shallow seas in a form that permits accurate planimetric image mapping of features to 20 meters of depth where the conditions of water clarity and bottom reflection are suitable. LANDSAT data also provide an excellent simulation of the earth's surface, for such applications as aeronautical charting and radar image correlation in aircraft and aircraft simulators. Radiometric enhancement, particularly edge enhancement, a technique only marginally successful with aerial photographs has proved to be high value when applied to LANDSAT data.

Colvocoresses, A. P.↗
NASA NTRS1977

Development of a multi-disciplinary ERTS user program in the state of Ohio

The author has identified the following significant results. Although the analysis of the results of presently - used methodology has showed inadequate correlation between the land use change and the various socio-economic factors, a system of analysis was produced that will aid in the future work in this area pointing out the adequacy of the land use data for producing models of desired accuracy. This testing methodology is applicable to other LANDSAT/land use interpretation systems.

Baldridge, P. E.↗
NASA NTRS1977

The application of ERTS imagery to the FAO/Unesco soil map of the world

The author has identified the following significant results. It was concluded that direct identification and mapping of the various soil degradation forms and intensities from the color composite imager was generally difficult, if not impossible. The imagery, however, provided valuable information on some main environmental criteria which can be used in connection other available field data to assess actual soil degradation and estimate soil degradation hazards.

Dudal, R. J.↗
NASA NTRS1977

Development of a multi-disciplinary ERTS user program in the state of Ohio

The author has identified the following significant results. The State of Ohio has an inventory in machine compatible form, such that, information about the land use in Ohio may be tailored to the requirements of the user and may be easily modified and updated as future needs arise.

Baldridge, P. E.↗
NASA NTRS1977

Statistical mapping of sheet aiquile SE-20-9 (national map) making use of ERTS images

New possibilities of remote sensing by means of satellites to do research on natural resources are reported. These images make it possible to carry out integrated studies of natural resources in the shortest time possible and with small investments. Various maps and a complete description of each are included. With the use of these satellites, scientists can hopefully plan development projects at the national level.

Torrez, J. G.↗
NASA NTRS1977

Bolivian satellite technology program on ERTS natural resources

The author has identified the following significant results. Application of digital classification for mapping land use permitted the separation of units at more specific levels in less time. A correct classification of data in the computer has a positive effect on the accuracy of the final products. Land use unit comparison with types of soils as represented by the colors of the coded map showed a class relation. Soil types in relation to land cover and land use demonstrated that vegetation was a positive factor in soils classification. Groupings of image resolution elements (pixels) permit studies of land use at different levels, thereby forming parameters for the classification of soils.

Brockmann, H. C.↗