  Keeping the relativistic laws of motion a non-conventional Pioneer effect
would prove an increase of the scale rate of atomic clocks in comparison with
planetary ones. Together with a slowly decreasing amount of about 60% due to
anisotropic radiation this would be a thinkable explanation for an apparent
anomalous acceleration of the Pioneer 10/11 probes. Such a difference between
atomic time and ephemeris time, however, (coincidentally corresponding to that
of atomic time and cosmic time as derived from any cosmological model of
general relativity, where the cosmic 'coordinate' speed of light is fixed to be
c* = c) is ruled out by solar system's observational facts. Thus a
non-conventional Pioneer effect would inevitably contradict relativity theory.
