1. Department of Physics and Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Colorado USA
2. DTU Space‐National Space Institute, Technical University of Denmark Department of Geodesy Kgs. Lyngby Denmark
3. Research Unit Engineering Sciences University of Luxembourg Luxembourg City Luxembourg
4. Department of Geophysics Stanford University Stanford California USA
5. Institute for Marine and Atmospheric Research Utrecht University Utrecht The Netherlands
6. UNAVCO Boulder Colorado USA