%0 Journal Article
%T Signal Travel Time Anomaly between Earth and Solar Planets
%A Fai£¿al Ramdani
%J Journal of High Energy Physics, Gravitation and Cosmology
%P 1472-1476
%@ 2380-4335
%D 2021
%I Scientific Research Publishing
%R 10.4236/jhepgc.2021.74089
%X Travel time anomaly in the communicatin of spatial instruments installed in solar planets and Earth are investigated in a model of gravity impact on radio signal propagation. Resulting travel times anomaly shows variations less than 10<sup>-3</sup> seconds to and from Venus and Mars while Sun provides anomaly travel times of about -2 ¡Á 10<sup>-2</sup> sec as backward signal needs more times than emitted signal from Earth. In the current explorations on Mars, the travel time anomaly may reach 1.8 ¡Á 10<sup>-4</sup> sec as orbital Mars position pass through its minimum distance with respect to Earth. Implications of the difference between one and two-way travel times may be related to redshift/blueshift while travel time of received signal is less or greater than emitted signal.
%K Radio Signal
%K Travel Times
%K Gravity
%K Solar Planets
%K Redshift
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=112611