EVAPOTRANSPIRATION BY ENERGY BALANCE BUDGET, APPLIED THEORY TO COMMON SATELLITE SENSORS Sensible heat flux is taking about 90% of the incoming Net Radiation in deserts (Iran, 1999) Yann Chemin 1 PhD student in remote sensing applications AIT, Bangkok 1 Personal contact: 206/7 Kamathawatte Road, Rajagiriya, Sri Lanka, Tel. +94 1 886053, Email. ychemin@yahoo.com