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  • 1
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    Passive seismic experiment (1970)
    In:  CASI
    Details
    Publication Date: 2004-12-06
    Description: Apollo 12 passive seismometer design and signal interpretation
    Keywords: GEOPHYSICS
    Type: APOLLO 12- PRELIM. SCI. REPT. 1 JUN. 1970; P 39-53
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Interpretation of geographic patterns in simulated orbital television imagery of earth resources (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: In order to better determine the effects of the television imagery characteristics upon the interpretation of geographic patterns obtainable from orbital television sensors, and in order to better evaluate the influences of alternative sensor system parameters such as changes in orbital altitudes or scan line rates, a team of three professional interpreters independently mapped thematically the selected geographic phenomena that they could detect in orbital television imagery produced on a fourteen inch monitor and recorded photographically for analysis. Three thematic maps were compiled by each interpreter. The maps were: (1) transportation patterns; (2) other land use; and (3) physical regions. The results from the three interpreters are compared, agreements noted, and differences analyzed for cause such as disagreement on identification of phenomenon, visual acuity, differences in interpretation techniques, and differing professional backgrounds.
    Keywords: GEOPHYSICS
    Type: Simulating and Interpreting Aerial or Orbital TV Observations of Geographic Patterns; p 35-84
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A system for simulating aerial or orbital TV observations of geographic patterns (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A system which simulates observation of the earth surface by aerial or orbiting television devices has been developed. By projecting color slides of photographs taken by aircraft and orbiting sensors upon a rear screen system, and altering scale of projected image, screen position, or TV camera position, it is possible to simulate alternatives of altitude, or optical systems. By altering scan line patterns in COHU 3200 series camera from 525 to 945 scan lines, it is possible to study implications of scan line resolution upon the detection and analysis of geographic patterns observed by orbiting TV systems.
    Keywords: GEOPHYSICS
    Type: Simulating and Interpreting Aerial or Orbital TV Observations of Geographic Patterns; p 7-34
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Analytical study of hydrogen turbopump cycles for advanced nuclear rockets Progress report, Sep. 15, 1964 - Sep. 15, 1965 (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Hydrogen turbopump cycles for obtaining high engine inlet pressures in advanced nuclear rockets, and data on gaseous nuclear reactors and heavy gas containment
    Keywords: NUCLEAR ENGINEERING
    Type: NASA-CR-68988 , D-910093-19
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Remote sensing of vigor loss in conifers due to dwarf mistletoe (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The initial operation of a multiband/multidate tower-tramway test site in northeastern Minnesota for the development of specifications for subsequent multiband aerial photography of more extensive study areas was completed. Multiband/multidate configurations suggested by the tower-tramway studies were and will be flown with local equipment over the Togo test site. This site was photographed by the NASA RB57F aircraft in August and September 1971. It appears that, of all the film/filter combinations attempted to date (including optical recombining of several spectral band images via photo enhancement techniques), Ektachrome infrared film with a Wratten 12 filter is the best for detecting dwarf mistletoe, and other tree diseases as well. Using this film/filter combination, infection centers are easily detectable even on the smallest photo scale (1:100,000) obtained on the Togo site.
    Keywords: GEOPHYSICS
    Type: NASA-CR-127682
    Format: application/pdf
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  • 6
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    Vigor loss in conifers due to dwarf mistletoe (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Practical remote sensing techniques were developed for detecting and evaluating vigor loss in forest conifers due to dwarf mistletoe. Eastern dwarf mistletoe (Arceuthobium pusillum) infection of black spruce (Picea mariana) was investigated. A tower-tramway system, 100 feet high, was erected over an infected stand in northeast Minnesota in June and multiband/multidate photography was initiated in July and is continuing. Four 70mm film-filter combinations were used in a multicamera unit: Plus-X/Wratten 58, Plus-X/Wratten 25A, Aero Infrared/Wratten 89B, and Ektachrome Infrared/Wratten 12. The stand of mistletoe-infected black spruce under the tramway was photographed three times per day (0900, 1200 and 1500 local sun time) at approximately 10 day intervals. An extensive test site, several square miles in area, was selected in north-central Minnesota for the purpose of testing photographic specifications developed on the tramway test site. One aerial photographic flight at a variety of altitudes was accomplished over the extensive test site in August. Data analyses are not available at this time.
    Keywords: GEOPHYSICS
    Type: NASA-CR-131582 , APR-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    An experimental study of thermally induced microfracturing and its relation to volcanic seismicity (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Thermoelastic seismic-energy release as source mechanism for volcanic earthquakes, describing thermal microfracture tests
    Keywords: GEOPHYSICS
    Type: ; 47 (
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Analytical design and performance studies of the nuclear light bulb engine (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Analytical studies were conducted to investigate in detail the heat balance characteristics of the nuclear light bulb engine. Distributions of energy deposition to all engine components from the fission process, conduction and convection, and thermal radiation were considered. Where uncertainties in basic data or heat transfer characteristics were encountered, ranges of heat loads were calculated and reference values were selected. The influence of these heat loads on engine performance, space radiator requirements, and cooling sequence and cooling circuit designs was determined. The analyses resulted in revisions to the previously reported reference engine characteristics, principally in the heat loads to some engine components and in the cooling sequence. These revisions were incorporated in the engine dynamics digital computer simulation program. No significant changes occurred in the dynamic response of the engine to perturbations in fuel injection rate, reactivity or exhaust nozzle area.
    Keywords: NUCLEAR ENGINEERING
    Type: NASA-CR-129295 , L-910900-16
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Analytical design and performance studies of nuclear furnace tests of small nuclear light bulb models (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Analytical studies were continued to identify the design and performance characteristics of a small-scale model of a nuclear light bulb unit cell suitable for testing in a nuclear furnace reactor. Emphasis was placed on calculating performance characteristics based on detailed radiant heat transfer analyses, on designing the test assembly for ease of insertion, connection, and withdrawal at the reactor test cell, and on determining instrumentation and test effluent handling requirements. In addition, a review of candidate test reactors for future nuclear light bulb in-reactor tests was conducted.
    Keywords: NUCLEAR ENGINEERING
    Type: NASA-CR-129296 , L-910900-17
    Format: application/pdf
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  • 10
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    Analytical studies of nuclear light bulb engine radiant heat transfer and performance characteristics (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Analytical model of nuclear light bulb engine radiant heat transfer and engine performance, dynamics and control, heat loads and shutdown characteristics
    Keywords: NUCLEAR ENGINEERING
    Type: NASA-CR-123189 , K-910900-10
    Format: application/pdf
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