Research Of Detecting Technology In Stratospheric Space

With the continuous development of space detecting, the Radar imaging technology has been widely used in Ground-based, Airborne and Spaceborne platform. The stratosphere is one layer of the Earth's atmosphere. The altitude range of the stratosphere is from 8km to 50km. There is very little convective turbulence in the stratosphere. Compared with the traditional platform, the stratospheric system has many distinct advantages. It has a smaller blind zone, higher cost-effective, better mobility, and more reusability. Nowadays, the stratospheric space has not been large-scale developed, and is still in researching stage. It has become a hot topic of research in imaging field. Drifting problem of the stratospheric ISAR system was discussed in-depth in this paper, the main content includes:1. In this paper, we take a research on the resolution of the original imaging radar, the matched filter technology in the range domain, the resolution technology on the azimuth domain, ISAR turntable model and popular imaging algorithm.2. Stratospheric SAR, ISAR imaging platform architecture were proposed. Analysis were made on every modules of the system.3. Based on the ISAR imaging features and the environment of stratospheric space, we established drifting model and instantaneous velocity model. We also find out the effects of drifting on imaging in theory.4. Simulation platforms of SAR and ISAR are established in this paper. Using these platforms, we take simulations for the imaging algorithm in the ideally stratospheric space. What is more, the model of ISAR imaging system drifting is verified under the simulation platform.