Shanghai Astronomical Observatory;
Chinese Academy of Sciences;
Shanghai 200030;
China;
Key Laboratory of Radio Astronomy;
Chinese Academy of Sciences;
Nanjing 210008;
China;
Shanghai Key Laboratory of Space Navigation and Positioning Techniques;
Shanghai 430074;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
microwave; holography-radio; astronomy-surface; deviation-least; squares method;