[1] Univ Leicester, Dept Phys & Astron, Space Res Ctr, Leicester LE1 7RH, Leics, England
[2] Open Univ, Dept Earth & Environm Sci, Milton Keynes MK7 6AA, Bucks, England
[3] Univ Helsinki, Univ Helsinki Observ, FIN-00014 Helsinki, Finland
[4] Max Planck Inst Solar Syst Res, D-37191 Katlenburg Lindau, Germany
[5] Max Planck Inst Halbleiterlabor, D-81739 Munich, Germany
[6] Space Syst Finland Ltd, Espoo 02200, Finland
[7] European Space Agcy, Estec, NL-2200 AG Noordwijk, Netherlands
[8] Photonis SAS, F-19106 Brive, France
[9] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[10] EADS Astrium Ltd, Stevenage SG1 2AS, Herts, England
[11] UCL, Birkbeck Res Sch Earth Sci, London WC1E 6BT, England
[12] Oxford Instruments Analyt Oy, FIN-02361 Espoo, Finland
[13] PNSensor GmbH, D-80803 Munich, Germany
[14] Finnish Meteorol Inst, FI-00560 Helsinki, Finland
[15] Patria Aviat OY, FI-33100 Tampere, Finland
[16] LIDAX, Madrid 28850, Spain
[17] Magna Parva Ltd, Loughborough Innovat Ctr, Loughborough LE11 3EH, Leics, England
[18] Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, Impacts & Astromat Res Ctr, London SW7 2AZ, England
[19] Inst Nacl Tecn Aeroespacial, Ctr Astrobiol CSIC INTA, Madrid 28850, Spain
[20] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England