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  • 1
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    Analysis of multiple incidence angle SIR-B data for determining forest stand characteristics (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: For the first time in the U.S. space program, digital synthetic aperture radar (SR) data were obtained from different incidence angles during Space Shuttle Mission 41-G. Shuttle Imaging Radar-B (SIR-B) data were obtained at incidence angles of 58 deg., 45 deg., and 28 deg., on October 9, 10, and 11, 1984, respectively, for a predominantly forested study area in northern Florida. Cloud-free LANDSAT Thematic Mapper (T.M.) data were obtained over the same area on October 12. The SIR-B data were processed and then digitally registered to the LANDSAT T.M. data by scientists at the Jet Propulsion Laboratory. This is the only known digitally registered SIR-B and T.M. data set for which the data were obtained nearly simultaneously. The data analysis of this information is discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: JPL The Second Spaceborne Imaging Radar Symposium; p 159-164
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    NASA applications project in Miami County, Indiana (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The study site selection is intended to serve all of the different research areas within the project, i.e., soil conditions, soil management, etc. There are seven major soil associations or soils formed on similar landscapes in the Miami Co., and over 38 soil series that were mapped. Soil sampling was conducted in some sites because of its variability in soils and cover types, variable topography, and presence of erosion problems. Results from analysis of these soil data is presented.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-188007 , NAS 1.26:188007
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    NASA applications project in Miami County, Indiana (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This project was designed to acquaint county government officials and their clientele with remote sensing and geographic information systems (GIS) products that contain information about land conditions and land use. The specific project objectives are: (1) to investigate the feasibility of using remotely sensed data to identify and quantify specific land cover categories and conditions for purposes of tax assessment, cropland area measurements, and land use evaluation; (2) to evaluate the use of remotely sensed data to assess soil resources and conditions which affect productivity; (3) to investigate the use of satellite remote sensing data as an aid in assessing soil management practices; and (4) to evaluate the market potential of products derived from the above projects.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-187916 , NAS 1.26:187916 , LARS-CR-012391
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Applying remote sensing and GIS techniques in solving rural county information needs (1992)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The project designed was to acquaint county government officials and their clientele with remote sensing and GIS products that contain information about land conditions and land use. Other users determined through the course of this project were federal agencies working at the county level, agricultural businesses and others in need of spatial information. The specific project objectives were: (1) to investigate the feasibility of using remotely sensed data to identify and quantify specific land cover categories and conditions for purposes of tax assessment, cropland area measurements and land use evaluation; (2) to investigate the use of satellite remote sensing data as an aid in assessing soil management practices; and (3) to evaluate the use of remotely sensed data to assess soil resources and conditions which affect productivity.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-190839 , NAS 1.26:190839 , LARS-PRINT-093092
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Comparison of classification schemes for MSS and TM data (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The launch of the Landsat-4 satellite in July 1982 provided the first full coverage from space of the 0.4-12 micron spectrum of the earth scene. In addition to the green, red, and near IR bands of the MSS, the TM provides a band in the blue, two in the middle IR, and one thermal IR. The paper describes spectral class analysis of coincident MSS and TM data to evaluate the contribution of the additional TM bands. In addition, various classifiers are available which were applied to the TM data. In the spectral class analysis, twice the number of separable classes was found in the TM data compared to the MSS data.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Machine processing of remotely sensed data: Thematic Mapper data and geographic information systems; Jun 12, 1984 - Jun 14, 1984; West Lafayette, IN
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Assessment of regional biomass-soil relationships using vegetation indexes (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The development of photosynthetic active biomass in different ecological conditions, as indicated by normalized difference vegetation indices (NDVIs) is compared by performing a stratified sampling (based on soil assocations) on data acquired over Indiana. Data from the NOAA-10 AVHRR were collected for the 1987 and 1988 growing seasons. An NDVI transformation was performed using the two optical bands of the sensor (0.58-0.68 microns and 0.72-1.10 microns). The NDVI is related to the amount of active photosynthetic biomass present on the ground. Samples of NDVI values over 45 fields representing eight soil associations throughout Indiana were collected to assess the effect of soil conditions and acquisition date on the spectral response of the vegetation, as shown by the NDVIs. Statistical analysis of results indicate that land-cover types (forest, forest/pasture, and crops), soil texture, and soil water-holding capacity have an important effect on vegetation biomass changes as measured by AVHRR data. Acquisition dates should be selected with condideration of the phenological stages of vegetation. Sampling of AVHRR data over extended areas should be stratified according to physiographic units rather than man-made boundaries. This will provide more homogeneous samples for statistical analysis.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); 29; 331-339
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Characterizing forest stands with multi-incidence angle and multi-polarized SAR data (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The potential for using HH-polarized L-band SAR data obtained at different incidence angles from satellite altitudes to identify and map different forest cover types and stand density classes is studied. Reasonably accurate results are obtained if the speckle characteristics of the data are suppressed by low-pass spatial filters and a contextual classification algorithm. Multipolarized L-band SAR data obtained from aircraft altitudes over the same test site are also analyzed to assess the relationships between polarization and forest stand characteristics. It is found that incidence angle controls, to a very large extent, the characteristics of the data and the type of information that can be obtained from L-band, HH-polarized satellite SAR data. Cross-polarization of L-band SAR data enhances and differentiates various forest stand characteristics which cannot be defined using only the like-polarized data, and vice-versa.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Advances in Space Research (ISSN 0273-1177); 7; 11 1
    Format: text
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