1201.5041 (A. Hees et al.)

Radioscience simulations in General Relativity and in alternative
theories of gravity    [PDF]

A. Hees, B. Lamine, S. Reynaud, M. -T. Jaekel, C. Le Poncin-Lafitte, V. Lainey, A. Füzfa, J. -M. Courty, V. Dehant, P. Wolf

In this paper, we focus on the possibility to test General Relativity in the
Solar System with radioscience measurements. To this aim, we present a new
software that simulates Range and Doppler signals directly from the space-time
metric. This flexible approach allows one to perform simulations in General
Relativity and in alternative metric theories of gravity. In a second step, a
least-squares fit of the different initial conditions involved in the situation
is performed in order to compare anomalous signals produced by a given
alternative theory with the ones obtained in General Relativity. This software
provides orders of magnitude and signatures stemming from hypothetical
alternative theories of gravity on radioscience signals. As an application, we
present some simulations done for the Cassini mission in Post-Einsteinian
Gravity and in the context of MOND External Field Effect. We deduce constraints
on the Post-Einsteinian parameters but find that the considered arc of the
Cassini mission is not useful to constrain the MOND External Field Effect.

View original: http://arxiv.org/abs/1201.5041