Design, position error analysis and adjustment of antenna array for geostationary interferometric microwave sounder

Geostationary interferometric microwave sounder (GIMS), which is developed by National Space Science Center of CAS, will be the main payload on board of FY-4M satellite to monitor and measure internal constitution and precipitation parameters of atmosphere cloud cluster. GIMS is an interferometric aperture synthesis radiometer. Antenna array of GIMS can obtain visibility functions of observation objects. It is very important for improving the system sensitivity and decreasing the complexity of the system. Design of the antenna array is the key technique of GIMS, and position error analysis and adjustment of antenna array is also very important for improving the quality of the retrieved image of GIMS. According to the system performance requirements of GIMS, theory and method for design, position error analysis and adjustment of the antenna array have been investigated, and simulated results is also be presented in this paper.