Preliminary experiment of one-dimensional imaging by microwave supersynthesis radiometer

The author is developing a demonstration radiometer for two-dimensional passive microwave imaging based on supersynthesis technique. For confirmation of the supersynthesis procedure and the sensitivity of the radiometer, one-dimensional imaging experiments were made using a microwave interferometer in 6 GHz band. Rotary scanning is adopted for simplicity of operation instead of linear scanning, which are fundamentals of the platform movement. Two kinds of targets were used including a point target and an extended target. The images are retrieved by synthesis. The peaked image of the point target shows the efficient process of the synthesis and the fine contrast of the building wall and the sky in the extended target implies high sensitivity of the radiometer for detecting lower brightness temperature than 300 K.