1. NASA Goddard Space Flight Center; Greenbelt MD USA
2. LATMOS/IPSL, CNRS, Sorbonne Université, UVSQ; Paris France
3. LATMOS/IPSL, UVSQ Université Paris-Saclay, UPMC Université Paris 06, CNRS; Guyancourt France
4. Space Sciences Laboratory; University of California; Berkeley CA USA
5. Department of Physics and Astronomy; University of Iowa; Iowa City IA USA
6. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder CO USA