First Results from the Rotation and Interior Structure Experiment on the InSight Mission to Mars

William M Folkner1, Veronique M A Dehant2, Sébastien Le Maistre2, Marie Yseboodt2, Attilio Rivoldini2, Tim Van Hoolst2, Daniel S Kahan1, Dustin Buccino1 and Fred J Calef III1, (1)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (2)Royal Observatory of Belgium, Brussels, Belgium