Acknowledgements
The development, deployment and operation of this network is sponsored by the: US National Science Foundation based on a Water Cycle Program award, Hellenic Secretariat for Research and Development, National Aeronautics and Space Administration based on the NAMMA Research award, Univeristy of Nevada, Companhia de Energia Eletrica do Ceara, Universidade Estadual do Ceara and Universidade de Sao Paulo.