Pascal Matte, Environment and Climate Change Canada, Meteorological Research Division, Quebec, QC, Canada, Silvia Innocenti, Environment and Climate Change Canada, Meteorological Research Division, Quebec City, QC, Canada, Marc Simard, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States and Alexandra Christensen, Jet Propulsion Laboratory, Suborbital Radar Science and Engineering, Pasadena, United States