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  • Other Sources  (3)
  • 1975-1979  (3)
  • 1970-1974
  • 1975  (3)
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  • 1975-1979  (3)
  • 1970-1974
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  • 1
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    The Pioneer 10/11 and Helios A/B cosmic ray instruments (1975)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: This paper describes the design and performance of a set of cosmic-ray particle experiments for the Pioneer 10/11 and Helios A/B space missions. These experiments had to be very light-weight, low-power and electronically sophisticated in order to meet the spacecraft and scientific requirements. Both sets of missions use several solid-state detector telescopes to measure protons from 100 KeV to 800 MeV and heavier ions up to Neon at 200 MeV per nucleon. Good performance is required for 7-8 years, and the system must tolerate large vibration loads and ionizing radiation doses up to 500,000 rads.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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    NASA TECHNICAL REPORTS
  • 2
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    The Helios A/B cosmic ray instrument /E 7/ (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: This paper describes the design and performance of a cosmic ray particle experiment for the Helios A/B space missions. This experiment had to be very lightweight, low power and electronically sophisticated in order to meet the spacecraft and scientific requirements, and very similar to those on the Pioneer 10 and 11 missions to Jupiter. Both sets of missions use several solid-state detector telescopes to measure protons from 100 KeV to 800 MeV per nucleon. Additionally, the Helios experiment includes a proportional counter to monitor the solar X-ray activity. The experiment has functioned quite well for 5 months in space, and large quantities of data are now being received.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Raumfahrtforschung; 19; Sept
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    NASA TECHNICAL REPORTS
  • 3
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    Infrared observations of the surface and atmosphere of Titan (1975)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Infrared photometry of Titan, Saturn, and Saturn's Rings at 3.5, 4.9, 17.8, and 18.4 microns is reported. Comparison of the albedo of Titan in the 4.9 micron 'window' with the albedo of the rings and with laboratory spectra suggests that frost, possibly water ice, could be a major constituent. If thick clouds are present they must be very dark at 4.9 microns. The 17.8 and 18.4 micron data are not consistent with a clear, dense molecular hydrogen atmosphere.
    Keywords: LUNAR AND PLANETARY EXPLORATION
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    NASA TECHNICAL REPORTS
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