The Study On The Airborne-Experimental Technology For The Spaceborne Wide-Swath Ocean SAR System

Synthetic Aperture Radar (SAR) is the high science and technology radar that can take high resolution imaging for the ground target by using the synthetic apertureprinciple and pulse compression technique. Sines the terrain, time, weather don’taffect it, SAR has been widely applied in the areas of military and civil and it has brought great benefits in economics and society. With the technology evolution and the application extension,the Ocean wide-Swath SAR has produed,It can not only obtain the Ocean parametors (wavelength, wave direction, wave height and interior wave etc),but also collect all information of the multifarious target on ocean surface;it can provide the information fountain for the controny economic construction and national defence construction, so the ocean SAR and its imaging have become a developing direction for SAR.This dissertation is based on the subject "the Airborne-Experimental system for the Spaceborne Ocean wide-Swath SAR system"; it is one innovation subject with a view to ocean dig area target surveillance,and has the future aspect. The conventional SAR was enslaved to the conflict of the azimuth resolution and antenna acreage,it could not realize the azimuth high resolution and wide swath at the same time, therefore,the high resolution-wide swath SAR and tis achieved technology need be researched, it is the base of the spacebron ocean wide swath SAR engineering achieve.Base on the SAR imaging principle and ocean imaging mechanism,the Dissertation thoroughly studied the double band SAR experimental system and its main key technique; the main contents of it are as follows:1) With the airborne double band SAR system basic, the Dissertation discuss the composing of the airborne system, the main technical index,and the system engineering achieve,and explain the rationality and feasibility of the system.2) For the demand of the wide swath SAR imaging on ocean, the Dissertation bring forward the double band SAR patch-imaging for the wide swath,and discuss the engineering realizing course of the double band SAR; it yet discuss the arzimuth one transimiter and many receiver displaced phase center antenna(DPCA) technique. With basic of the azimuth Doppler frequency spectrume reconstruction, it researches the one transimiter and many receiver multi-channel imaging technique,the real SAR data validated the practicability of the imaging method,it established the techenique basic for spacebrone ocean wide swath SAR system. 3) The double band and nesting comman caliber SAR system is initiate in china,the succeed manufacturethe of the engineering experimental specimen is affluent in the techenique means for the airbrone-SAR, it points out the direction of the airborne wide swath SAR realized technique, and establishes the the basic for its technology development.The nesting double band and comman caliber SAR system and its imaging are the foreland aspects in SAR, I am sure the study works will have definite referenceand applications value for the study of SAR system design and imaging.