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  • 1970-1974  (32)
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Year
  • 1
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    Multispectral observations of marine environments (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: It is demonstrated that the multispectral scanner, using multiple channels in registry and recorded on magnetic tape, can be used in variety of applications in the marine environment.
    Keywords: GEOPHYSICS
    Type: NASA. Manned Spacecraft Center 4th Ann. Earth Resources Program Rev., Vol. 4; 23 p
    Format: application/pdf
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  • 2
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    Measurement of water depth by multispectral ratio techniques (1970)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The technique for measuring the depth of water using a multispectral scanner is discussed. The procedure takes advantage of the absorption properties of different wavelengths of light. Making use of the property of the selected transmission of light at different wavelengths, an equation was developed relating the outputs of at least two channels of multispectral scanner to measure water depth.
    Keywords: GEOPHYSICS
    Type: 3d Ann. Earth Resources Program Rev., Vol. 3; 11 p
    Format: application/pdf
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  • 3
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    Progress of an ERTS-1 program for Lake Ontario and its basin (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The Lake Ontario drainage basin covers over 32,000 square miles of U.S. and Canadian territory. ERTS-1 data is contributing to the comprehensive study of this basin as part of the International Field Year for the Great Lakes (IFYGL). This paper details a processing approach for obtaining detailed and objective synoptic information thought to be applicable to terrestrial water balance studies of such a large area. A simple ratio algorithm was tested for minimizing daily variations in ERTS data and for allowing the discrimination of surface features and land use classes of hydrologic significance. These steps are necessary if ERTS data is to provide the quantitative information required for the study and management of areas of regional size.
    Keywords: GEOPHYSICS
    Type: PAPER-W15 , NASA. Goddard Space Flight Center Symp. on Significant Results obtained from the ERTS-1, Vol. 1, Sect. A and B; p 829-836
    Format: application/pdf
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  • 4
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    Calculations of water depth from ERTS-MSS data (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: ERTS-1 MSS data taken on October 10, 1972 of the Little Bahama Bank are being used to demonstrate the use of ERTS-1 data for mapping of shallow water features for the purpose of upgrading world navigation charts. Marked reflectance differences occur for the shallow water areas in Bands 4, 5, and 6. Digital processing of two adjacent data tapes within the ERTS frame covering an area of about 40 by 40 miles has been completed. Correlation of depth measurements to 5 meters has been successful. A mathematical model for depth measurements using ratio of voltages in Band 4 and 5 has been successfully developed and is being tested for accuracy. Additional studies for areas near Puerto Rico and in Northern Lake Michigan will be undertaken. Satellite data will also provide geographical evidence for verifying existence or nonexistence of doubtful shoal waters now appearing on world charts and considered to be hazardous to shipping.
    Keywords: GEOPHYSICS
    Type: PAPER-M20 , NASA. Goddard Space Flight Center Symp. on Significant Results obtained from the ERTS-1, Vol. 1, Sect. A and B; p 1433-1441
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  • 5
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    Updating coastal and navigational charts using ERTS-1 data (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A successful processing algorithm for extracting water depth information from ERTS data has been developed. Depth charts for two geographical areas have been constructed representing different solar illumination and water transparency conditions. Absolute depth calculations for water depth to 4.5 fathoms have been demonstrated for the Little Bahama Bank. Depth Charts also were constructed using data in Band 4 and 5 of the ERTS-1 MSS for areas in Lake Michigan. This data represented a low sun angle, poor light transmission in water conditions and gave useful results to 200 meters. In both cases, the ERTS map represented an update in shallow water detail in comparison with available navigation charts for the areas tested. Present processing costs to provide MSS depth charts are estimated to be on the order of $1.50 per sq. mile. The updating of navigation charts for areas hazardous to shipping is an achievable direct application.
    Keywords: GEOPHYSICS
    Type: PAPER-M4 , NASA. Goddard Space Flight Center 3d ERTS-1 Symp., Vol. 1, Sect. B; p 1333-1346
    Format: text
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  • 6
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    A Skylab program for the International Hydrological Decade (IHD) (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10094 , NASA-CR-141057 , ERIM-102300-12-L
    Format: application/pdf
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  • 7
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    A Skylab program for the International Hydrological Decade (IHD) (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. The development of the algorithm (using real data) relating red and IR reflectance to surface soil moisture over regions of variable vegetation cover will enable remote sensing to make direct inputs into determination of this important hydrologic parameter.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10093 , NASA-CR-141157 , ERIM-102300-13-L
    Format: application/pdf
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  • 8
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    Skylab water depth determination (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10048 , NASA-CR-140950 , ERIM-102100-11-L
    Format: application/pdf
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  • 9
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    A Skylab program for the International Hydrological Decade (IHD) (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10039 , NASA-CR-140776 , ERIM-102300-8-L
    Format: application/pdf
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  • 10
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    A Skylab program for the International Hydrological Decade (IHD) (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: E74-10358 , NASA-CR-137043 , ERIM-102300-7-L , QR-3
    Format: application/pdf
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