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  • ASTRONAUTICS (GENERAL)  (1)
  • ELECTRONICS  (1)
  • 1970-1974  (2)
  • 1960-1964
  • 1
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    The Backup-Gilbert method and its application to the electrical conductivity problem (1972)
    In:  CASI
    Details
    Publication Date: 2006-03-12
    Description: The theory of Backus and Gilbert gives a technique for solving the general linear inverse problem. Observational error and lack of data are shown to reduce the reliability of the solution in different ways: the former introduces statistical uncertainties in the model, while the latter smooths out the detail. Precision can be improved by sacrificing resolving power, and vice versa, so that some compromise may be made between the two in choosing the best model. Nonlinear inverse problems can be brought into the domain of the theory by linearizing about a typical solution. The inverse problem of electrical conductivity in the mantle is used to illustrate the Backus-Gilbert technique; an example of the tradeoff diagram is given.
    Keywords: ELECTRONICS
    Type: NASA. Ames Res. Center Math. of Profile Inversion; 8 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Planning and management of science programs on Skylab (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Discussion of the experience gained in experiment operation planning during the Skylab mission. The Skylab flight planning activity allowed the experimenters to interact with the system and provided the flexibility to respond to contingencies both major and minor. Both these aspects contributed to make efficient use of crew time thus helping to increase the science return from the mission. Examples of the need for real time scheduling response and of the tradeoffs considered between conflicting experiment requirements are presented. General management principles derived from this experience are developed. The Skylab mission experiences, together with previous Apollo mission experiences, are shown to provide a good background for Shuttle flight planning.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: AIAA PAPER 74-1215
    Format: text
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    NASA TECHNICAL REPORTS
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