A Method for Obtaining Radio Images with High-Spatial Resolution by Using A Single Small Radio Telescope and the Test Results-The Application of DFT to Astronomy (Ⅱ)

The details by means of the DFT image restoration method for obtaining the images with high spatial resolution with a single small radio telescope, are presented in this paper, including the measurement and fitting of the antenna pattern, the determination of the filtering function of a one-dimensional radio solar image and the effects of the noise on the restoration accuracy and spatial resolution of the image. The restored results of three tests are given, of which the result obtained on July 1, 1987, is quite similar to that obtained with an interferometer at the Fleurs Station, Australia. A resolution of about 7 are minutes is attained from the estimation of the restored details. Finally, a method for finding the equivalent antenna diameter and the width of the main lobe by means of the one-dimensional radio solar scanning image is given in the appendix.