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  • 1
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    Pioneer 10 and 11 interstellar studies (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Pioneer 10 spacecraft may soon be the first man-made object to leave our solar system and penetrate the heliospheric boundary into interstellar space. Scientific investigators on this mission eagerly anticipate the opportunity to measure the physical processes occurring in the terminal boundary region and in the unexplored space known as the interstellar medium by astronomers who have studied it remotely with telescopes for many years. This paper is a descriptive overview of the Pioneer 10 mission and the dominant physical processes that have been discovered since its 1972 launch into our heliosphere and those processes that we expect to see at the boundary and in the interstellar medium.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: In: Space Congress, 29th, Cocoa Beach, FL, Apr. 21-24, 1992, Proceedings (A93-25276 08-12); p. 6-1 to 6-12.
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  • 2
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    Future operations of Pioneer 10 and 11 (1993)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Pioneers 10 and 11 spacecraft were launched on 2 March 1972 and 5 April 1973 and are now 53 and 35 AU from the sun. Pioneer 10 is now the most distant man-made object in our solar system and the in situ measurements of the gas and dust surrounding the sun have been obtained for almost two solar sunspot cycles. Plasma analyzer measurements out to 50 AU show that the mean velocity is about 430 km/sec, the mean density decreases as R exp -2, and that the terminal shock has not been encountered. The magnetic field is drawn out to form Archimedean spirals in the ecliptic place and dipolelike asymmetry in the polar directions as predicted by the Parker model. Galactic cosmic ray measurements of the intensity and radial gradient indicate a 'modulation boundary' between 70 to 100 AU from the sun. All measurements to date indicate that both spacecraft are within the heliosphere and proceeding toward the outer boundary where the modulating effect of solar activity on cosmic ray intensity ceases.
    Keywords: ASTROPHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 13; 6; p. 267-274.
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  • 3
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    Lunar surface magnetometer experiment (1970)
    In:  CASI
    Details
    Publication Date: 2004-12-06
    Description: Apollo 12 magnetometer data and selenomagnetic field determinations
    Keywords: GEOPHYSICS
    Type: APOLLO 12- PRELIM. SCI. REPT. 1 JUN. 1970; P 55-73
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  • 4
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    Lunar surface magnetometer experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 16 lunar surface magnetometer (LSM) activation completed the network installation of magnetic observatories on the lunar surface and initiated simultaneous measurements of the global response of the moon to large-scale solar and terrestrial magnetic fields. Fossil remanent magnetic fields have been measured at nine locations on the lunar surface, including the Apollo 16 LSM site in the Descartes highlands area. This fossil record indicates the possible existence of an ancient lunar dynamo or a solar or terrestrial field much stronger than exists at present. The experimental technique and operation of the LSM are described and the results obtained are discussed.
    Keywords: SPACE SCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 14 p
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  • 5
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    Lunar portable magnetometer experiment (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Lunar portable magnetometer experiment to measure steady magnetic field at different sites in Fra Mauro region - Apollo 14 flight
    Keywords: SPACE SCIENCES
    Type: APOLLO 14 PRELIM. SCI. REPT. 1971; P 227-237
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  • 6
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    Lunar portable magnetometer experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The purpose of the Apollo 16 lunar portable magnetometer (LPM) experiment is to measure the permanent magnetic field at different geological sites on the lunar surface. The LPM field measurements are a vector sum of the steady remanent field from the lunar crust and of the time-varying ambient fields. The remanent magnetic fields measured in the Descartes region are the largest extraterrestrial fields yet measured in situ. These measurements show for the first time that the Descartes highlands have a stronger remanent magnetization than do the mare regions of the previous Apollo landing sites. The experimental technique used in the LPM experiment is described and the preliminary results obtained are discussed.
    Keywords: SPACE SCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 8 p
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  • 7
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    Lunar surface magnetometer experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 15 lunar-surface magnetometer (LSM) is one of a network of magnetometers that have been deployed on the moon to study intrinsic remanent magnetic fields and global magnetic response of the moon to large-scale solar and terrestrial magnetic fields. From these field measurements, properties of the lunar interior such as magnetic permeability, electrical conductivity, and temperature can be calculated. In addition, correlation with solar-wind-spectrometer data allows study of the the solar-wind plasma interaction with the moon and, in turn, investigation of the resulting absorption of gases and accretion of an ionosphere. These physical parameters and processes determined from magnetometer measurements must be accounted for by comprehensive theories of origin and evolution of the moon and solar system.
    Keywords: SPACE SCIENCES
    Type: Apollo 15 Prelim. Sci. Rept. te; 16 p
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  • 8
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    Measurements of lunar magnetic field interaction with the solar wind. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Study of the compression of the remanent lunar magnetic field by the solar wind, based on measurements of remanent magnetic fields at four Apollo landing sites and of the solar wind at two of these sites. Available data show that the remanent magnetic field at the lunar surface is compressed as much as 40% above its initial value by the solar wind, but the total remanent magnetic pressure is less than the stagnation pressure by a factor of six, implying that a local shock is not formed.
    Keywords: SPACE SCIENCES
    Type: Nature; 236; Apr. 21
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  • 9
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    The magnetism of the moon (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Lunar magnetic fields measured by magnetometers placed by Apollo 12 and 14 astronauts, considering permanent fields due to fossil magnetic material and transient fields
    Keywords: SPACE SCIENCES
    Type: ; IBRATIONAL COMBUSTIO
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  • 10
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    Lunar electrical conductivity profile (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Lunar electrical conductivity profile measurements, providing mantle-core stratification near surface thermal gradient, heat flux and composition data
    Keywords: SPACE SCIENCES
    Type: ; YSICA STATUS SOLIDI
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