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  • EARTH RESOURCES AND REMOTE SENSING  (291)
  • SPACECRAFT DESIGN, TESTING AND PERFORMANCE  (80)
  • 1980-1984  (371)
  • 1955-1959
  • 1940-1944
  • 1981  (190)
  • 1980  (181)
Collection
Keywords
Years
  • 1980-1984  (371)
  • 1955-1959
  • 1940-1944
Year
  • 1
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    Thermal mapping, geothermal source location, natural effluents and plant stress in the Mediterranean coast of Spain (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Although no significant results were achieved during the report period, research continues. A sample of imagery showing thermal inertia and temperature differences over the northeastern United States and Europe was received. The project coordinator attended a TELLUS Project meeting in Ispra, Italy at which general guidelines for the future were established and the quality of the data received was discussed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E81-10119 , NASA-CR-164113 , PR-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Seasat data utilization project (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: During the three months of orbital operations, the satellite returned data from the world's oceans. Dozens of tropical storms, hurricanes and typhoons were observed, and two planned major intensive surface truth experiments were conducted. The utility of the Seasat-A microwave sensors as oceanographic tools was determined. Sensor and geophysical evaluations are discussed, including surface observations, and evaluation summaries of an altimeter, a scatterometer, a scanning multichannel microwave radiometer, a synthetic aperture radar, and a visible and infrared radiometer.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-168557 , REPT-622-233
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Studies of high latitude current systems using MAGSAT vector data (1981)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The magnetic disturbance fields caused by global external current systems are considered with particular emphasis on improving the understanding of the physical processes which control high latitude current systems. Following processing the MAGSAT data were routinely plotted in the Universal Time (UT) format as well as in a polar plot format. The H'D'U' coordinate system, was adopted as the standard for representing the MAGSAT residual magnetic field vectors. A data file was generated and the TPOLAR computer code was developed to determine from the orbital elements, the time, latitude, and MLT of the extremum latitude of each transpolar segment of orbit. The precision of the vector data set from MAGSAT prompted an extended exploratory phase for data analysis procedures, modeling techniques and phenomenology.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10188 , NASA-CR-168616 , NAS 1.26:168616 , PR-3
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Studies of high latitude current systems using Magsat vector data (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Disturbance fields caused by global external current systems are analyzed in order to gain an improved understanding of the phydical processes which control high latitude current systems and to increase the confidence level in the identification of internal field levels. The basic approach is to: (1) categorize the vector data by those physical parameters important for investigation of external current systems; (2) map the disturbances for appropriate conditions; (3) model the currents which might cause the mapped disturbances; and (4) correlate results with data from other sources. It is concluded that the Magsat data set appears to have remarkably high precision and quality and should permit major advances to be made in modeling current distribution at high latitudes in the ionosphere and magnetosphere.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E81-10085 , NASA-CR-163785 , PR-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    LACIE - An application of meteorology for United States and foreign wheat assessment (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: This paper describes the overall Large Area Crop Inventory Experiment technical approach utilizing the global weather-reporting network and the Landsat satellite to make a quasi-operational application of existing research results, and the accomplishments of this cooperative experiment in utilizing the weather information. Global weather data were utilized in preparing timely yield estimates for selected areas of the U.S. Great Plains, the U.S.S.R. and Canada. Additionally, wheat yield models were developed and pilot tested for Brazil, Australia, India and Argentina. The results of the work show that heading dates for wheat in North America can be predicted with an average absolute error of about 5 days for winter wheat and 4 days for spring wheat. Independent tests of wheat yield models over a 10-year period for the U.S. Great Plains produced a root-mean-square error of 1.12 quintals per hectare (q/ha) while similar tests in the U.S.S.R. produced an error of 1.31 q/ha. Research designed to improve the initial capability is described as is the rationale for further evolution of a capability to monitor global climate and assess its impact on world food supplies.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Journal of Applied Meteorology; 19; Jan. 198
    Format: text
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  • 6
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    Irrigation survey in Sherburne County, Minnesota (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Approximately 70% of Minnesota's irrigation is with center pivot distribution systems whose diagnostic appearance on remotely sensed imagery is a circular pattern which can be readily identified on LANDSAT MSS band imagery. Fields irrigated with traveling guns, laterals, booms, or cornering systems either result in angular field patterns or obscure the circular patterns normally visible on imagery. The IDMS system at Goddard was used to develop a LANDSAT digital classification of the Sherburne County area, which located fields regardless of shape, and was not dependent of visual interpretation. Ground truth collection and classification attempts are described in an effort to inventory all wells in the area.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Goddard Space Flight Center Eastern Reg. Remote Sensing Appl. Conf.; p 63-68
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Interactive capabilities: Between unacceptable and unnecessary (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A very low cost interactive image analysis computer system suitable for use in education, research, or operational remote sensing applications system should be centered around a high quality image display through which the analyst can use photointerpretation skills to evaluate and alter computer mapping or classification calculations. The definition of acceptable capabilities for such a system must take into account the needs of the image analyst balanced with current state-of-the-art technology and cost. A range of acceptable capabilities is defined based primarily on image analysis requirements, but tempered occassionally by cost and technology constraints. Desirable parameters are also listed.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Purdue Univ. CORSE-81: The 1981 Conf. on Remote Sensing Educ.; p 285-290
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  • 8
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    Complexities of nadir-looking radiometric temperature measurements of plant canopies (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Effective radiant temperatures (ERTs) of five wheat canopies in different stages of development were measured during morning and noon periods. The observed variability in nadir sensor response was quantitatively described as a function of canopy structure and the vertical temperature profile of canopy components. In many cases, the nadir sensor ERT was a poor measure of vegetation temperature due to effects of soil emissions. Strong vertical temperature profiles of vegetation components were also observed. The theory and measurements presented document that remote measurements of vegetation canopy temperatures cannot be made indiscriminately over large spatial regions without consideration of the underlying physical principles.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Applied Optics; 19; July 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    View angle effects in the radiometric measurement of plant canopy temperatures (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The thermal infrared sensor response from a wheat canopy was extremely non-Lambertian because of spatial variations in energy flow processes; the effective radiant temperature of the sensor varied as much as 13 C with changing view angle. This variation of sensor response was accurately quantified (root-mean-square of deviations between theoretical and measured responses reduced to 1.1 C) as a function of vegetation canopy geometry, vertical temperature distribution of canopy components, and sensor view angle. The results have important implications for optimizing sensor view angles for remote sensing missions.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Remote Sensing of Environment; 10; Dec. 198
    Format: text
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  • 10
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    Snow Electromagnetic Measurements (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: An electromagnetic system is described for measuring the dielectric constant and attenuation of snow samples in the frequency range of 4 to 12 GHz. System components consists of a swept-frequency source, microwave horns, network analyzer, and XY plotter. The procedure for calibrating the effect of wetness on the snow properties is described. Equations are given that express the experimentally determined relation between attenuation per unit length and volume percent wetness at any frequency between 4 and 12 GHz. permittivity can be calculated from the snow density, attenuation per unit length, and frequency. Some applications of the techniques are described such as runoff forecasting from mountain snowpacks.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA. Goddard Space Flight Center Microwave Remote Sensing of Snowpack Properties; p 93-117
    Format: text
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