Broadening and anomalous shift of Pioneer VI telemetry line - an effect of coronal inhomogeneities useful for diagnostics

Details Broadening and anomalous shift of Pioneer VI telemetry line - an effect of coronal inhomogeneities useful for diagnostics Broadening and anomalous shift of Pioneer VI telemetry line - an effect of coronal inhomogeneities useful for diagnostics

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....51..171c&link_type=abstract

Astronomy and Astrophysics, vol. 51, no. 2, Sept. 1976, p. 171-183.

Astronomy and Astrophysics

Astrophysics

2

Bandwidth, Microwave Transmission, Radio Telemetry, Red Shift, Solar Corona, Electron Density Profiles, Inhomogeneity, Pioneer 6 Space Probe, Radio Occultation, Shock Discontinuity, Solar Activity Effects, Solar Wind, Stellar Occultation

Scientific paper

The observational results of Goldsten (1969) on the perturbations of the frequency and bandwidth of the Pioneer VI 2.3 GHz telemetry signal during its occultation by the sun are reexamined from the viewpoint of whether the observed redshifts are of instrumental or solar origin. The observations are shown to be unreliable since the probe frequency was not controlled. Analysis of possible solar influences on the frequency arising from electron density inhomogeneities on the global scale, macroscopic scale, mesoscale, or microscopic scale shows that classical physics can explain the observed anomalies, and that a new model of photon-photon interaction is not needed. A likely explanation is that in the experiment the corona was almost always being observed when relaxing after the passage of a discontinuity, most probably a shock.

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