1. Physical Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia
2. Space and Aeronautics Institute Geodesy and Navigation Center King Abdulaziz City for Science and Technology (KACST) Riyadh Saudi Arabia
3. Sorbonne Université INSU CNRS Paris France
4. Institut de Physique du Globe de Strasbourg Université de Strasbourg/EOST CNRS Strasbourg Cedex France
5. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology Cambridge MA USA