Radioscience simulations in General Relativity and in alternative   theories of gravity
  In this communication, we focus on the possibility to test GR with radioscience experiments. We present a new software that in a first step simulates the Range/Doppler signals directly from the space time metric (thus in GR and in alternative theories of gravity). In a second step, a least-squares fit of the involved parameters is performed in GR. This software allows one to get the order of magnitude and the signature of the modifications induced by an alternative theory of gravity on radioscience signals. As examples, we present some simulations for the Cassini mission in Post-Einsteinian gravity and with the MOND External Field Effect. 
Aurelien Hees, Peter Wolf, Brahim Lamine, Serge Reynaud, Marc-Thierry   Jaekel, Christophe Le Poncin-Lafitte, Valery Lainey,...
gr-qc