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  • 1
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    Borehole probes: Summary of previous work (1971)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: Previous research explored the applicability of some devices to lunar borehold testing and, in particular, examined the use of such instruments to assess the strength of soils and rocks. Special attention was given to borehole jacks, which essentially conduct a plate bearing test across opposing wall areas. Analytical work employed finite element analysis, the theory of plasticity, and the theory of elasticity using the complex variable method. A number of solutions were reached for tractable subproblems in the set of problems posed when a jack is used to expand sectors of a borehole. In addition, an investigation with physical models was made to explore the modes of behavior for varying boundary conditions and materials, including both elastic and plastic media.
    Keywords: SPACE SCIENCES
    Type: Lunar Surface Eng. Properties Expt. Definition, Vol. 3; 14 p
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  • 2
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    A tone-burst technique of sound-absorption measurement (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Normal incidence sound absorption coefficient by propagating narrow bandwidth sinusoidal pulse and measuring amplitude before and after reflection
    Keywords: PHYSICS, GENERAL
    Type: ; ADEMIE DES SCIENCES
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  • 3
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    Mariner Jupiter/Saturn 1977 - The mission frame. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Following the cancellation of the Outer Planet Grand Tour Project, NASA and JPL examined less ambitious, alternative missions for exploring the outer planets. The mission that proved most attractive scientifically and fits within the projected NASA budget constraints embraces dual flights to Jupiter and Saturn, with launch in 1977. NASA has implemented it as the Mariner Jupiter/Saturn 1977 (MJS77) Project. The MJS77 mission covers exploratory investigations of the Jupiter and Saturn planetary systems and the interplanetary medium out to Saturn. Items of special interest include Jupiter's great red spot, the question of Io's anomalous brightening and phenomena associated with its EM behavior. After Saturn encounter, the spacecraft will escape the solar system in the general direction of the solar apex.
    Keywords: SPACE SCIENCES
    Type: Astronautics and Aeronautics; 10; Nov. 197
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  • 4
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    The occultation of beta Scorpii by Jupiter and Io. I - Jupiter. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Use of computer-controlled one-dimensional area-scanning photometers to observe the occultation of the Beta Scorpii system by Jupiter on May 13, 1971. Six high-quality light curves were obtained; three of the occultations of the brighter component Beta Sco A and three of Beta Sco C. The mean scale height of the Jovian upper atmosphere is 32 plus or minus 6 km near -10 deg zenographic latitude, 31 plus or minus 2 km at -47 deg zenographic latitude, and 24 plus or minus 2 km at -57 deg zenographic latitude. The determination of the atmospheric scale height is highly sensitive to the background level subtracted, providing a possible explanation of an earlier result by Baum and Code (1953) placing the scale height at about 8 km. Correlated departures of the light curve from a theoretical isothermal curve are reproduced in the three bright-star curves, and are thus not due to random density fluctuations in the Jovian atmosphere, but are rather due to global stratification. Details of the stratification, which includes at least a number of warm layers, are examined by deconvolution of the light curves. There is evidence for a high-temperature (T greater than 300 K) thermosphere on two of the bright-star light curves.
    Keywords: SPACE SCIENCES
    Type: Astronomical Journal; 77; Feb. 197
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  • 5
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    Io's triaxial figure. (1972)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Timings from photoelectric observations of four immersions and two emersions of the recent occultation of Beta Scorpii C by Io have made it possible to derive Io's apparent equatorial radius to an accuracy of 2 km. However, when the distortion of Io attributable to rotation and tides raised by Jupiter is considered, the derived mean radius becomes several kilometers less than the observed equatorial radius. If Io were a homogeneous fluid body in hydrostatic equilibrium and in synchronous rotation, it would show a bulge along a line to Jupiter about 20 km in radius greater than the polar radius. The mean radius thus derived is (1818 plus or minus 5) km and mean density (2.88 plus or minus 0.34) g/cu cm, the largest uncertainty being attributable to the value of Io's mass. The new value for Io's radius is higher than those previously determined and suggests about 30% lower values for mean densities of all Galilean satellites.
    Keywords: SPACE SCIENCES
    Type: Icarus; 17; Aug. 197
    Format: text
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  • 6
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    Mariner Jupiter/Saturn 1977 preliminary mission design. (1972)
    In:  Other Sources
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    Publication Date: 2019-07-27
    Description: Current plans of NASA are to take advantage of the 1977 launch opportunity by sending a Mariner class spacecraft on a gravity assisted flyby of Jupiter which will then continue on to Saturn. The background of this Mariner Jupiter-Saturn 77 Project is reviewed and science objectives for this mission as currently adapted are given. This paper illustrates properties of the Jupiter-Saturn opportunities between 1976 and 1980 to give context to the 1977 opportunity. Details of the possibilities for the 1977 launch are shown along with constraints and example candidate trajectories. Options include close flybys and/or occultations of the satellites at Jupiter and Saturn, penetration of Saturn's rings, and various occultations of the planets. A short discussion of other factors, such as navigation and planetary quarantine (documented elsewhere) are included.
    Keywords: SPACE SCIENCES
    Type: AIAA PAPER 72-943 , American Institute of Aeronautics and Astronautics and American Astronautical Society, Astrodynamics Conference, Palo Alto; Sept. 11-12, 1972; Palo Alto, CA
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  • 7
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    Test for planetary influences on solar activity (1973)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: A method due to Schuster is used to test the hypothesis that solar activity is influenced by tides raised in the sun's atmosphere by planets. We calculate the distribution in longitude of over 1000 flares occurring in a 6 1/2 yr segment of solar cycle 19, referring the longitude system in turn to the orbital positions of Jupiter and Venus. The resulting distributions show no evidence for a tidal effect.
    Keywords: SPACE SCIENCES
    Type: Solar Physics; 31; July 197
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  • 8
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    Jupiter's magnetosphere as observed with Pioneer 10 (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: During November and December 1973 the spacecraft Pioneer 10 provided the first in situ observations of energetic particles in the magnetosphere of Jupiter. Observations made with a University of Iowa instrument are reported. It is found that Jupiter's magnetosphere consists of two quite different parts. The outer magnetosphere has the form of a thin, disk-like, quasi-trapping region extending from about 20 to 100 planetary radii. The inner magnetosphere is characterized by a dipolar magnetic field and very high intensities of durably trapped energetic particles. Particle intensities throughout both regions are discussed, taking into account conditions at the orbits of Io, Europa, and Ganymede.
    Keywords: SPACE SCIENCES
    Type: AD-784642 , Astronautics and Aeronautics; 12; July-Aug
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  • 9
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    The effect of haze on the visibility of Martian surface features (1971)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Mars surface features contrast reduction, discussing forward scattering haze as possible cause
    Keywords: SPACE SCIENCES
    Type: ; - PHYSICAL METALLURG
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  • 10
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    The orbit of Comet Newman 1932f-1932VII (1970)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Calculating definitive orbit of Comet Newman with consideration of planetary perturbations
    Keywords: SPACE SCIENCES
    Type: COMMUN. OF THE LUNAR AND PLANETARY LAB., COMMUN. NOS. 153-159, VOL. 8, PT. 5 1970; P 331-332
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