Workshop 13-14 May in 2009 : First workshop held in May 2009 in Toulouse, where we reviewed previous works on the issue, and discussed our experimental and modeling plans.
Workshop 17-18 June 2010 : Discussion on ongoing studies, and on the planned 2011 field experiment.
Meeting 24 February 2011 : We have discussed the operations of the June-July 2011 field experiment.
Workshop 6-7 February 2012 : Firenze, Italy. Outcome of the field experiment and organization of the analysis.