Beijing Key Laboratory of Space Environment Exploration;
National Space Science Center;
Chinese Academy of Sciences;
Beijing 100190;
Wegener Center for Climate and Global Change and Institute for Geophysics;
Astrophysics;
and Meteorology/Institute of Physics;
University of Graz;
Graz A-8010;
Joint Laboratory on Occultations for Atmosphere and Climate;
Beijing 100190;
Institute of Atmospheric Physics;
Chinese Academy of Sciences;
Beijing 100029;
Future Missions and Instrument Division;
European Space Agency;
Noordwijk;
NL-2200;
Danish Meteorological Institute;
Copenhagen;
DK-2100;
Innovation Academy for Microsatellite of Chinese Academy of Sciences;
Shanghai 201210;
University of Chinese Academy of Sciences;
Beijing 100049;
Climate; Greenhouse; gases; Water; Microwave; occultation; Infrared-laser; occultation;