1. Natural Resources and Environmental Studies Institute University of Northern British Columbia Prince George BC Canada
2. Now at National Oceanic and Atmospheric Administration Global Monitoring Laboratory Boulder CO USA
3. Now at Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA
4. National Oceanic and Atmospheric Administration Global Monitoring Laboratory Boulder CO USA
5. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA
6. California Institute of Technology Division of Geological and Planetary Sciences Pasadena CA USA
7. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
8. SRON Netherlands Institute for Space Research Utrecht The Netherlands
9. National Centre for Earth Observation University of Leicester Leicester UK
10. Earth Observation Science School of Physics and Astronomy University of Leicester Leicester UK
11. Department of Physics University of Toronto Toronto ON Canada