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  • Other Sources  (4)
  • 1975-1979  (4)
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  • 1
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. First order benefits can generally be quantified, thus allowing quantitative comparisons of candidate land cover data systems. A meaningful dollar evaluation of LANDSAT can be made by a cost comparison with equally effective data systems. Users of LANDSAT data can be usefully categorized as performing three general functions: planning, permitting, and enforcing. The value of LANDSAT data to the State of Georgia is most sensitive to the parameters: discount rate, digitization cost, and photo acquisition cost. Under a constrained budget, LANDSAT could provide digitized land cover information roughly seven times more frequently than could otherwise be obtained. Thus on one hand, while the services derived from LANDSAT data in comparison to the baseline system has a positive net present value, on the other hand if the budget were constrained, more frequent information could be provided using the LANDSAT system than otherwise be obtained.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E78-10076 , NASA-CR-151615
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-13
    Description: The benefits involved in the transfer of NASA remote sensing technology to eight Georgia state agencies are identified in quantifiable and qualitative terms, and a value for these benefits is computed by means of an effectiveness analysis. The benefits of the transfer are evaluated by contrasting a baseline scenario without Landsat and an alternative scenario with Landsat. The net present value of the Landsat technology being transferred is estimated at 9.5 million dollars. The estimated value of the transfer is most sensitive to discount rate, the cost of photo acquisition, and the cost of data digitalization. It is estimated that, if the budget is constrained, Landsat could provide data products roughly seven times more frequently than would otherwise be possible.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: SOUTHEASTCON ''78; Proceedings of the Southeast Region 3 Conference; Apr 10, 1978 - Apr 12, 1978; Atlanta, GA
    Format: text
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  • 3
    Publication Date: 2019-07-13
    Description: The objectives of the program were: (1) development of methodology based on the technical requirements of potential services that might be assigned to millimeter wave bands for identifying the viable and appropriate technologies for future NASA millimeter research and development programs, and (2) testing of this methodology with user applications and services. The scope of the program included the entire communications network, both ground and space subsystems. The reports include: (1) cost, weight, and performance models for the subsystems, (2) conceptual design for point-to-point and broadcast communications satellites, (3) analytic relationships between subsystem parameters and an overall link performance, (4) baseline conceptual systems, (5) sensitivity studies, (6) model adjustment analyses, (7) identification of critical technologies and their risks, (8) brief R&D program scenarios for the technologies judged to be moderate or extensive risks.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA-CR-159504
    Format: application/pdf
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  • 4
    Publication Date: 2019-07-13
    Description: Identification of technologies for millimeter satellite communication systems, and assessment of the relative risks of these technologies, were accomplished through subsystem modeling and link optimization for both point-to-point and broadcast applications. The results, in terms of annual cost per channel to the user from a commercial view point, are described.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA-CR-159503
    Format: application/pdf
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