Institute of Applied Physics and Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, Bern, Switzerland

ITM Physics Laboratory, Mail Code 675, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

German Aerospace Centre (DLR), Institute for Solar-Terrestrial Physics, Neustrelitz, Germany

GATS, Boulder, CO, USA

Center for Space and Atmospheric Research, Embry‐Riddle Aeronautical University, Daytona Beach, FL, USA

Colorado Center for Astrodynamics Research, University of Colorado Boulder, Boulder, CO, USA

British Antarctic Survey, Cambridge, CB3 0ET, UK

Fraunhofer Institute for Computer Graphics Research IGD, Rostock, Germany

Department of Astronomy, Space Science and Geology, Chungnam National University, Daejeon 34134, South Korea

Australian Antarctic Division, Kingston, Tasmania, Australia

Department of Astronomy, Space Science and Geology, Chungnam National University, Daejeon 34134, South Korea

British Antarctic Survey, Cambridge, CB3 0ET, UK

Department of Electronic and Electrical Engineering, University of Bath, Bath, UK

Colorado Center for Astrodynamics Research, University of Colorado Boulder, Boulder, CO, USA