The application of power density spectrum estimation on synthetic aperture radiometer

Aperture synthetic is a technique for overcoming the limitation that a large antenna aperture places on passive microwave remote sensing form space. This is an interferometric technique in which pairs of small antennas are used together with signal processing to achieve the solution of a single large aperture antenna. In this technique, the product of the signal from each pair of antennas is measured using a correlation radiometer. The complex product is recorded for pairs of antennas at many different spacings. The spacing is called a baseline and both the magnitude and orientation of the distance between the antennas is important. Once the place and the number of antennas are determined, the complex products are determined. In this paper, we get more complex products by the method of power density spectrum estimation to improve the temperature sensitive.