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  • SPACE SCIENCES  (7)
  • MASERS  (1)
  • Life Sciences
  • 1970-1974  (8)
  • 1972  (8)
  • 1
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    The particles and fields subsatellite magnetometer experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A preliminary analysis of magnetometer data from Apollo 15 subsatellite is concluded. Remanent magnetization is a characteristic property of the moon, and the distribution is such that a complex pattern is produced. A mapping of the distribution is feasible with the present experiment. Lunar induction fields produced by transients in interplanetary magnetic field are detectable at satellite orbit. Magnetometer data will provide estimates of the latitude and longitude dependences of interior conductivity. The plasma void extends to some altitude below the satellite orbit and probably the lunar surface. Solar wind near the limbs is usually strongly disturbed.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spaceflight Center Apollo 15 Prelim. Sci. Rept.; 9 p
    Format: text
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  • 2
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    Preliminary mapping of the lunar magnetic field (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Magnetic field measurements made with the Apollo 15 subsatellite established the existence of remanent magnetization over much of the Moon's surface. The major features of the structure of the measured remanent field are apparently associated with large craters, the most apparent detected to date being that in the vicinity of the Van de Graaff crater. A preliminary contour map of relative magnetic intensity was produced for a limited region of the Moon. A high resolution plot of the Van de Graaff region was constructed from vector data in an attempt to locate the source of the largest feature observed.
    Keywords: SPACE SCIENCES
    Type: Univ. Space Res. Assoc. High Pressure Phys. and Planetary Interiors; p 167-174
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  • 3
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    Supersonic electrical-discharge copper vapor laser. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A copper vapor laser, utilizing a pulsed discharge transverse to a supersonic flow of copper vapor, argon, and helium and oscillating at 5106 and 5782 A, has been built and tested. Laser energy densities per pulse of 2.5 microjoules per cu cm have been achieved to date. Laser pulse widths of up to 185 nsec have been obtained with delay times after initiation of the current pulse of 220 to 250 nsec. Both the delay time and pulse width are in good agreement with theoretical predictions. Quenching of the laser pulse is shown to be due to a rapid increase in the rate of equilibration of the lasing levels by electron collisions, and to a decrease in the differential pumping of the lasing levels from the ground state because of a decay in the electron temperature.
    Keywords: MASERS
    Type: Applied Physics Letters; 21; Dec. 15
    Format: text
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  • 4
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    Power spectra of the interplanetary magnetic field near the earth (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Power spectra of the interplanetary magnetic field measured by near-earth satellites upstream from the earth's bow shock are free from terrestrial contamination provided the field at the satellite does not intersect the bow shock. Considerable spectral enhancement for the range of frequencies 0.01 to 1.00 Hz, due to turbulence caused by the shock, may occur if the field observed at the satellite intersects the shock. This turbulence occurs frequently in both the morning and afternoon quadrants. In the frequency band from 0.07 to 1 Hz, this noise decreases in amplitude with radial distance from the shock with an attenuation length of 4 R sub E.
    Keywords: SPACE SCIENCES
    Type: NSSDC-ID-68-014A-14-PM , NASA. Ames Res. Center Solar Wind; p 375-381
    Format: application/pdf
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  • 5
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    Results of the Mariner 6 and 7 Mars occultation experiments (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Final profiles of temperature, pressure, and electron density on Mars were obtained for the Mariner 6 and 7 entry and exit cases, and results are presented for both the lower atmosphere and ionosphere. The results of an analysis of the systematic and formal errors introduced at each stage of the data-reduction process are also included. At all four occulation points, the lapse rate of temperature was subdadiabatic up to altitudes in excess of 20 km. A pronounced temperature inversion was present above the surface at the Mariner 6 exit point. All four profiles exhibit a sharp, superadiabatic drop in temperature at high altitudes, with temperatures falling below the frost point of CO2. These results give a strong indication of frozen CO2 in the middle atmosphere of Mars.
    Keywords: SPACE SCIENCES
    Type: NASA-TN-D-6683 , G-1050
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  • 6
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    Large-scale coherence and high velocities of the earth's bow shock on February 12, 1969. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The earth's bow shock exhibited a clean laminar profile at low Mach number as it crossed and recrossed Ogo 5, Heos 1, and Explorer 33 on February 12, 1969. The approximate 120 earth radii distance between Heos and Explorer during one set of crossings indicated the abrupt character of the laminar shock 'front' and the absence of magnetosheath turbulence both in the dayside hemisphere above the ecliptic and in the flank of the shock 75 earth radii behind the earth and below the ecliptic. The abruptness of the shock and coplanarity of the loci of Ogo and Heos with the local shock normal permit the most reliable estimates yet obtained of shock velocities along the normal. These mean velocities ranged from 11 to at least 100 km/sec over distances of 2-7 earth radii.
    Keywords: SPACE SCIENCES
    Type: NSSDC-ID-68-014A-14-PM , Journal of Geophysical Research; 77; Mar. 1
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  • 7
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    Outer magnetosphere near midnight at quiet and disturbed times. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Ogo 5 magnetic-field and energetic-electron (E greater than 50 keV) data are used to study both the quiet-time, steady-state configuration of the outer magnetosphere or near tail region near midnight and the disturbed time changes of this configuration. The nighttime cusp is found to be a distinct feature within the plasma sheet at quiet times but indistinguishable from the plasma sheet at disturbed times. The sequence of thinning and expansion of the plasma sheet in this region in association with the substorms is studied. The response of the plasma sheet in the near tail at about 10 earth radii is found to be similar to that in the more distant tail at more than 20 earth radii. Finally, the nature of field-aligned currents flowing on the plasma-sheet boundary is investigated. Assuming infinite current sheets, the sheet current density at Ogo 5 is found to be approximately .01 A/m.
    Keywords: SPACE SCIENCES
    Type: NSSDC-ID-68-014A-13-PM , NSSDC-ID-68-014A-14-PM , Journal of Geophysical Research; 77; Oct. 1
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  • 8
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    Magnetic and electric waves in space. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Waves play a fundamental role in many processes occurring in the solar wind and in the magnetosphere. These waves have been observed by a variety of experiments on many different spacecraft and analyzed with an increasing number of different techniques. In this review, we examine a number of the recent observations of waves in space, discussing the role of waves in the various regions and their characteristics, and illustrating some of their techniques used in their analysis.
    Keywords: SPACE SCIENCES
    Type: NSSDC-ID-68-014A-16-OS , Symposium on Earth''s magnetospheric processes; Aug 30, 1971 - Sep 10, 1971; Cortina; Italy
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