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  • SPACE RADIATION  (2)
  • COMMUNICATIONS
  • 1975-1979  (2)
  • 1
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    Detection of anisotropy in the cosmic blackbody radiation (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Anisotropy has been detected in the cosmic blackbody radiation with a 33-GHz (0.9 cm) twin-antenna Dicke radiometer flown to an altitude of 20 km aboard a U-2 aircraft. In data distributed over two-thirds of the Northern Hemisphere, an anisotropy is observed, which is well fitted by a first-order spherical harmonic with an amplitude of (3.5 plus or minus 0.6) x 10 to the -3rd deg K, and direction 11.0 plus or minus 0.6 h right ascension and 6 plus or minus 10 deg declination. This observation is readily interpreted as due to motion of the earth relative to the radiation with a velocity of 390 plus or minus 60 km/sec.
    Keywords: SPACE RADIATION
    Type: Physical Review Letters; 39; Oct. 3
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Aether drift and the isotropy of the universe: a measurement of anisotropies in the primordial black-body radiation (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This experiment detected and mapped large-angular-scale anisotropies in the 3 K primordial black-body radiation with a sensitivity of 2x.0001k and an angular resolution of about 10 degs. It measured the motion of the Earth with respect to the distant matter of the Universe (Aether Drift), and probed the homogeneity and isotropy of the Universe (the Cosmological Principle). The experiment used two Dicke radiometers, one at 33 GHz to detect the cosmic anisotropy, and one at 54 GHz to detect anisotropies in the residual oxygen above the detectors. The system was installed in the NASA-Ames Earth Survey Aircraft (U-2), and operated successfully in a series of flights.
    Keywords: SPACE RADIATION
    Type: NASA-CR-158129 , SSL-SER-20-ISSUE-10
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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