A large reflector antenna is one of the key components of a deep space telemetry track and command (TT&C) network,which is of great importance for human space activities,such as satellite com-munication,spaceflight,and deep space exploration [1].The main feature of this antenna type is its large aperture and often it requires strict surface accuracy to ensure high gain and high point-ing performance [2,3].There are two kinds of reflector antennas:non-fully movable antenna and fully steerable antenna.The Five-hundred-meter Aperture Spherical Radio Telescope in China is one representative non-fully movable antenna with a super large aperture and low operation frequency.The fully steerable reflector antennas worldwide can be further divided into four categories according to their aperture diameters and highest operation fre-quencies,as shown in Fig.1.Most of the antennas in Fig.1 can be found in Ref.[4] and the details are not presented here.Category 1 includes the traditional reflectors with large apertures and low operation frequencies.Category 2 includes large antennas with actuators on their reflectors to adjust the surface,and normally,the operation frequency is much higher than that of Category 1 antennas,which have nonadjustable reflectors.For example,the 100 m Green Bank Telescope (GBT) in America has 2004 panels supported by 2209 actuators.Category 3 includes submillimeter-wave antennas with higher surface accuracy but a smaller aper-ture.For example,the surface accuracy of the 12 m radio telescope for the Atacama Large Millimeter Array (ALMA) are 0.01 mm.The submillimeter-wave antennas with large aperture and high surface accuracy (Category 4) are still in their conceptual stage [5] because the service performance of submillimeter-wave antennas with a large aperture is more sensitive to their working environment.