Reply to ``On the Systematic Errors in the Detection of the Lense-Thirring Effect with a Mars Orbiter '', by Giampiero Sindoni, Claudio Paris and Paolo Ialongo

In this note we reply to the criticisms by Sindoni, Paris and Ialongo concerning some aspects of the recent frame-dragging test performed by Iorio with the Mars Global Surveyor (MGS) spacecraft in the gravitational field of Mars.