1. a Department of Geography and Human Environment , Tel-Aviv University, P.O.B. 39040 Tel-Aviv , 69978 Israel
2. b Soil Erosion Research Station , Soil Conservation and Drainage Division, Ministry of Agriculture, CO/Rupin College Emek Hefer , 40250 Israel
3. c Bar-Kal Systems Engineering, Ltd., 20, Giborei Israel st. POB , 8661 Netanya, 42504 Israel
4. d Center for the Study of Earth from Space , Cooperative Institute for Research in Environment Sciences (CIRES), University of Colorado at Boulder Campus , Box 216 Boulder CO 80309-0216, USA
5. e Agricultural Research Organization, Department of Field Crops and Natural Resources, Gilat Research Center, MP Negev , 85280, Israel
6. f The Remote Sensing Laboratory , Jacob Blaustein Institute for Desert Research, Ben Gurion University of the Negev, Sede Boker Campus 84990 , Israel