Design And Implementation Of Multi-mode SAR/InSAR Automated System Design Software

Synthetic Aperture Radar(SAR)is a kind of high resolution remote sensing imaging Radar which can work all day long.Since the 1950 s,Synthetic Aperture Radar(SAR)technology has been developing continuously,and many countries have invested a lot of manpower and material resources to develop space-borne SAR technology.In order to meet different observation needs,different imaging modes,such as strip mode,spotlight mode and scanning mode,have been produced.The satellite can be switched between different modes to get the image and meet the different needs of users.Interferometric Synthetic Aperture Radar(InSAR)technology is developed on the basis of SAR technology.It can obtain threedimensional information of the observation scene by taking advantage of the difference of perspectives of different satellites,which also has the advantages of all-day,all-weather and high-precision.SAR and InSAR products are now widely used in a variety of fields.Due to the high complexity of SAR/InSAR system,the correctness of its design results is often difficult to guarantee.Therefore,in order to ensure the stability and accuracy of SAR and InSAR,it is necessary to design and study the system.This paper mainly studies how to use theoretical knowledge to carry out system design and analysis in practice,and combines theory with software engineering to design intelligent,efficient,concise and humanized system design software,which provides assistance for SAR/InSAR system design.The main research contents and innovation points are as follows:1.The development of SAR and InSAR systems is summarized,and the basic theory of SAR full-link system design is introduced.The calculation and selection methods of signal bandwidth,antenna size,ambiguity,pulse repetition frequency,peak power of transmitter and other parameters in different modes are explained,and the similarities and differences of these parameters design in different modes are analyzed.And the basic theory of precision analysis of InSAR system,based on which the extension of baseline design is carried out.On the theoretical basis,combined with the previous SAR system design results,the accuracy analysis and baseline design example analysis are systematically carried out.The influence of various error sources on the measurement accuracy is included,and the contradiction in the selection of baseline length is illustrated.2.An automated system design software architecture is proposed.For SAR/InSAR system design complexity is high,the characteristics of the mutual restriction between the parameters,add more automated in software mode input function and parameter database update mechanism,the combination of the design and analysis,can intelligently iteration and feedback,and modify the design according to the results of the feedback parameter values,make the final design result is more accurate and practical.Wave position design module can combine a variety of parameters and indexes to select the optimal wave position.In addition,manual editing module also makes the design result more stable and reduces risks.Using the App Designer tool combined with HTML,j Query,CSS language to develop the corresponding interface,the interface combines the system design algorithm and software development design,divided into seven modules,and show the main interface.3.Five kinds of automated SAR system design processes are proposed to cope with different observation modes.These five design processes combine the basic design principles of the SAR system with the automated software architecture,so that the system design of different modes can not only retain their own unique calculation module,but also share the performance evaluation and feedback module.As far as possible to reduce the difficulty of software algorithm design,but also improve the efficiency of calculation and result accuracy.Finally,an example design is used to show the operating process of the software and verify the correctness of the results.4.The deficiencies and improvement direction of software design are analyzed and summarized,and the future work is prospected.