2Cooperative Institute for Research in Environmental Sciences, University of Colorado, University of Colorado,, Boulder, Co 80309 United States ; NOAA Aeronomy Laboratory, NOAA, Boulder, Co 80309 United States
NOAA Aeronomy Laboratory, NOAA, Boulder, Co 80309 United States
Physics, McGill University, 3600 University st., Montreal, Que H3A 2T8 Canada
Physics, McGill University, 3600 University st., Montreal, Que H3A 2T8 Canada
LMM, U. P. et M. Curie, Case 162 4 Pl. Jussieu, Paris, 75005 France ; MétéoFrance, 1 Quai Branly, Paris, 75007 France