1. Hydrogeology Department, GNS Science, Lower Hutt, New Zealand
2. Mathematical & Statistical Sciences, University of Colorado, Denver, CO, USA
3. Semeion Institute, Rome, Italy
4. Satellite Monitoring Unit, Brazilian Corporation of Agricultural Research-EMBRAPA, Campinas, Brazil
5. Earth Sciences Department, University of Florence, Florence, Italy
6. Center for Meteorological and Climatological Research in Agriculture, University of Campinas, Campinas, Brazil