Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA

Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada

Experimental Studies Section, Environment Canada, Toronto, ON, Canada

Experimental Studies Section, Environment Canada, Toronto, ON, Canada

Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada

Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA

Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada

Department of Physics and Atmospheric Science, Dalhousie University, Centre for Research in Earth and Space Science, York University, Toronto, Ontario, Canada

Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada

Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada

Department of Chemistry, University of York, Heslington, York, UK

Department of Chemistry, University of Waterloo, Waterloo, ON, Canada

Department of Chemistry, University of Waterloo, Waterloo, ON, Canada

Department of Radio and Space Science, Chalmers University of Technology, Göteborg, Sweden

Experimental Studies Section, Environment Canada, Toronto, ON, Canada