The HEGIFTOM Focus Working Group is lead by Roeland Van Malderen (RMI, Uccle, Belgium) & Herman Smit (FZJ/IEK-8, Jülich, Germany).

In the core group, the different instrumental networks are represented by at least one member:

• Dobson and Brewer Umkehr: Irina Petropavlovskikh (NOAA/GML, Boulder, USA)
• Fourier Transform Infrared Radiometer (FTIR): Corinne Vigouroux (BIRA, Uccle, Belgium)
• Light Detection and Ranging (Lidar): Thierry Leblanc (NASA/JPL, Pasadena, USA)
• In-service Aircraft for a Global Observing System (IAGOS): Romain Blot (Laboratoire d'aérologie, Toulouse, France)
• Ozonesondes: Roeland Van Malderen and Herman Smit
• Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) instruments: Michel Van Roozendael & François Hendrick (both BIRA, Uccle, Belgium)
• Pandora instruments: Alexander Cede (Luftblick, Innsbruck, Austria)

Gabriele Pfister (NCAR, Boulder, USA) is the TOAR-II Scientific Steering Committee Liaison Member.

To join HEGIFTOM, please register here or send an e-mail to one of the core group members!