shifters. We will also perform a ground-based energy transmission test by using a small model airplane as a target before launch. The airplane will fly around at a height of about 15 m, power being solely provided by the microwave beam. The space and ground tests will provide a good opportunity to demonstrate the feasibility of wireless energy transmission as well as providing critical data of the system. The other objective is to study nonlinear plasma effects occuring when the high power microwave beam hits the environment of space. If the intensity of the microwaves is of the order of that used in communicaltions, very little effect on the ionospheric plasma is expected. However, the power density of microwaves used in the transmission of power is twelve orders of magnitude larger and strong nonlinear effects are expected. Among these are plasma heating and nonlinear scattering with the excitation of various plasma waves. The METS rocket experiement provides a unique opportunity for advanced scientific research in this area. METS is to use a mother-daughter rocket. The mother section is mainly used for microwave transmission, while the daughter section carries a microwave receiver and diagnostic packages to detect effects on the plasma. The configuration of the METS rocket is shown in Fig. 4.
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