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  • EARTH RESOURCES AND REMOTE SENSING  (3,277)
  • 1980-1984  (3,277)
  • 1960-1964
Collection
Keywords
Years
Year
  • 1
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    Satellite-derived ice data sets no. 1: Antarctic monthly average microwave brightness temperatures and sea-ice concentrations, 1973 - 1976 (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A summary data set concerning 4 years of Antarctic sea-ice conditions was created and is available on magnetic tape. The data were derived from electrically scanning microwave radiometer brightness temperatures and were mapped into a polar stereographic grid enclosing the 50 deg S latitude circle. The grid size varies from about 32 by 32 sq km at the poles to about 28 by 28 sq km at 50 deg S. The microwave brightness temperatures of Antarctic sea ice are predominantly characteristic of first-year ice with an emissivity of 0.92 at 19 GHz frequency. Sea ice concentrations were calculated from the brightness temperature data for each grid element with an algorithm that uses an emissivity value of 0.92 and an ice physical temperature estimate from climatological surface air temperatures. Monthly, multiyear monthly, and yearly maps of brightness temperatures and sea ice concentrations were created for the 4 years, except for 7 months for which useable data were insufficient.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-83812
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Flow Resistivity Instrument (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A method and apparatus for making in-situ measurements of flow resistivity on the Earth's ground surface is summarized. The novel feature of the invention is two concentric cylinders, inserted into the ground surface with a measured pressure applied to the surface inside the inner cylinder. The outer cylinder vents a plane beneath the surface to the atmosphere through an air space. The flow to the inner cylinder is measured thereby indicating the flow from the surface to the plane beneath the surface.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Computational aspects of remapping digital imagery (1982)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: One of the advantages of automated cartography is that map data stored in the digital computer can be plotted or displayed at any scale or projection by recomputing the coordinates of the data. This is especially easy in the case of vector (graphics) data but in the case of digital image (raster) data, remapping is a more difficult operation. Examples of the remapping of digital imagery would include rectification of a LANDSAT MSS to an orthographic or Mercator projection, warping of one image to register with another, or rotation, scale, or aspect changes of a digital image. Use of general purpose computers and array processors for this task will be covered. Data processing error will be discussed for each modelling/warping approach.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Proc. of the NASA Workshop on Registration and Rectification; p 358-370
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    The Pennsylvania defoliation application pilot test (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Satellite imagery for the State of Pennsylvania was digitally mosaicked to provide the seed data base for monitoring defoliation of hardwood trees by the gypsy moth. Two separate mosaics for the state were prepared, one before defoliation and one after defoliation, to determine the extent, direction, and impact of gypsy moth activity in the state. The digital mosaic technology used to construct the data base was transferred to Pennsylvania State University to permit periodic updates to the data base and to assist in planning and abatement activities. Participating agencies or institutions included Goddard Space Flight Center and the Pennsylvania State University Office for Remote Sensing of Earth Resources.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E84-10111 , NASA-CR-173481 , JPL-PUB-83-65 , NAS 1.26:173481
    Format: application/pdf
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  • 5
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    Evaluation of LANDSAT-4 TM and MSS ground geometry performance without ground control (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Techniques and software developed to characterize the Washington, D.C. scene were improved and are being systematically applied to an Imperial Valley, CA scene. Digital elevation files are being acquired. One hundred seventy-two tiepoints were located in the Imperial Valley scene. They were digitized from USGS maps to determine their lat-long coordinates. A least squares fit is currently being performed between line-sample image data and the lat-long positions of the tiepoints. Thematic mapper scanner sweeps were determined for the Imperial Valley P-data. VICAR jobs are currently under way to analyze sample-direction offsets between sweeps in the data, as well as band to band registration offsets. Tiepoint location is about to begin in the Harrisburg, PA scene.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10338 , NASA-CR-172907 , NAS 1.26:172907
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Technology for large digital mosaics of Landsat data (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Procedures and software for the digital mosaicking of Landsat data are discussed. It is noted that image processing in support of JPL's planetary program has furnished the software and procedures necessary to achieve digital image mosaicking of vidicon imagery using rigid projective geometry. The incorporation of ground-control points, by either manual or automatic ground-control point file identification, has yielded rms positional accuracies exceeding the National Map Accuracy Standards. Rotation to north vertical is effected at low computational cost. It is possible to cut input data frames in any arbitrary shape to remove cloud cover and accommodate terrain offset effects. In similar fashion, the final digital mosaic can be segmented arbitrarily to conform to user requirements. Information is presented on applications in Pennsylvania and Bolivia.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Photogrammetric Engineering and Remote Sensing (ISSN 0099-1112); 49; Sept
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Evaluation of LANDSAT-4 TM and MSS ground geometry performance without ground control (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: LANDSAT thematic mapper P-data of Washington, D.C., Harrisburg, PA, and Salton Sea, CA were analyzed to determine magnitudes and causes of error in the geometric conformity of the data to known earth-surface geometry. Several tests of data geometry were performed. Intra-band and inter-band correlation and registration were investigated, exclusive of map-based ground truth. Specifically, the magnitudes and statistical trends of pixel offsets between a single band's mirror scans (due to processing procedures) were computed, and the inter-band integrity of registration was analyzed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E84-10022 , NASA-CR-174546 , NAS 1.26:174546
    Format: application/pdf
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  • 8
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    Forest Environments (1984)
    In:  CASI
    Details
    Publication Date: 2014-09-12
    Description: The application of remote sensing measurement techniques to scientific questions involving forests is a necessity because of the extent of forests, their variability, and the need to measure their interaction with environmental processes. The synoptic view given by remote sensing data of the extent, variability, and relation to environmental processes involving energy balances, disposition of water, and tree growth in relation to elemental storage of carbon, nitrogen and other essential elements is essential to understanding the forest in a scientific way. The ability to make comparisons in these properties at various intervals allows the determination of process functions and rates where the forest affects environmental properties. The ultimate objective in using these data is to define the extent of the forest and wildland resource, to determine the changes that are occurring in the resource due to utilization by man under conditions of changing market and population demands, and to evaluate the correlated changes occurring in various environmental properties influenced by forest vegetation on a local as well as global scale.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Earth Observing System. Vol. 1, pt. 2: Sci. and Mission Requirements; p A18-A20
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Safety evaluation methodology for advanced coal extraction systems (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Qualitative and quantitative evaluation methods for coal extraction systems were developed. The analysis examines the soundness of the design, whether or not the major hazards have been eliminated or reduced, and how the reduction would be accomplished. The quantitative methodology establishes the approximate impact of hazards on injury levels. The results are weighted by peculiar geological elements, specialized safety training, peculiar mine environmental aspects, and reductions in labor force. The outcome is compared with injury level requirements based on similar, safer industries to get a measure of the new system's success in reducing injuries. This approach provides a more detailed and comprehensive analysis of hazards and their effects than existing safety analyses.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-164703 , JPL-PUB-81-54
    Format: application/pdf
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  • 10
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    Health and safety evaluation of a modified tunnel borer design for application to single entry coal mine development (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A health and safety analysis of a single entry coal tunnel borer system is given. The results of the health analysis indicated that while the tunnel borer design offered improvements in dust control through the use of water sprays, a higher face ventilation rule, and the application of spalling rather than the conventional grinding process, it interjected an additional mutagen and toxic compound into the environment through the use of shotcrete. The tunnel borer system easily conformed with the prescribed fatality limit, but exceeded the required limits for disabling and overall injuries. It also exhibited projected disabling and overall injury rates considerably higher than existing continuous mining injury rates. Consequently, the tunnel borer system was not considered an advanced system.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-168807 , JPL-PUB-82-12 , NAS 1.26:168807 , DOE/ET-12548/11
    Format: application/pdf
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