It briefly introduces the international development status of the high resolution for air-to-ground remote sensing satellite.
High resolution for the air-to-ground observation is also the civil and martial pursuing target. Because of the rising cost
along with the large-diameter telescope, the weight, cubage will also become large. Nowadays, how to get high
resolution with light weight, small cubage launch and large diameter is one of the important research directions in many
countries. We raise a method of large field-of-view and high resolution optical synthesis telescope which can solve this
problem. It is a co-phased segment mirrors which synthetic aperture diameter is about 1 m. Four 50cm diameter segment
mirrors can fulfill the requirement. It is folded during its launch and is spread after it reaches to its working spot. In this
way, it can reach the requirement of low launch weight, small launch cubage and can get high resolution observation.
This method contains the key technologies of real-time UV coverage, optics design optimization, co-phase measurement
and adjustment, micro-displacement sensor technology, the optics design and structure design. We explore the
technology which can fulfill field-of-view of 1.86° and the resolution of 0.4m. We will discuss the UV-coverage method
which includes the aperture arrangement, the relationship between the aperture number and the synthetic aperture
diameter. There are much more detail calculation and analysis to it. Something is discussed about its structure design and
optics design in the paper.