[Objective]Syntheticaperture radar(SAR)is an active observation technology distinguished by its all-time and all-weather monitoring capability.Consequently,SAR systems offer distinctive advantages in disaster monitoring,environmental surveillance,and mapping applications.However,given the intricacies of the SAR system,data acquisition is confined to mobile platforms,such as aircraftand satellites.This limitation poses challenges to the teaching of the SAR course as it requires hands-on experiments.To address this issue,an experimental platform for the virtual simulation of SAR high-resolution imaging was designed and developed.[Methods]This platform includes an experimental business,application presentation,logic control,and data analysis layers.The experimental business layer includes three modules:System design and data acquisition,signal processing,and evaluation and application.Each module includes 2-4 submodules.The progressive design according to the actual field experiment process of the SAR can restore the experimental design,equipment operation,data processing,and other processes.The application presentation layer provides students with an immersive experience and guarantees ateaching effect.The logic control layer provides convenience for human-computer interaction and enhances students'sense of participation in the experiment.The data analysis layer can analyze and reproduce experimental problems to consolidate basic knowledge.The virtual simulation experiment comprises system design,experiment planning,data acquisition,signal processing,and image evaluation.Through computer simulation,the entire SAR experiment is simulated with high display,fidelity,and interaction.At each simulation stage,students can emulate the characteristics of the simulation experiment,including high model reproducibility,repeatability,ease of interaction,and safety.In the system design and experiment planning stage,students can intuitively and swiftly adjust the installation position of system components and arrange the experiment scenes.In the signal processing stage,students can exercise control over the simulation process through modular programming on the simulation platform.In the evaluation stage,students can visually assess the experimental results using the built-in graphical programming of the simulation platform.Notably,a comprehensive process analysis and feedback mechanism have been devised to assist students in accurately identifying their shortcomings and promptly rectifying them.[Results]The outcomes of this experimental platform are outlined as follows:①The realistic simulation of the actual scene of the experiment is performed to deepen students'understanding of the basic knowledge of the SAR system.Concurrently,the mechanisms of step prompt,after-class feedback,and evaluation are established to help students understand their shortcomings and make improvements in a timely fashion.②The operation,design,and processing of the actual experiments are reproduced,providing students with opportunities to practice and explore that are not easily accessible in reality,helping students learn SAR technology and improve their professional and technical abilities.③The teaching method combining simulation and practical operation is established.This open experimental design can improve students'innovation ability and comprehension quality.[Conclusions]The platform has completed several rounds of service teaching and is open to the public online.After background information sorting and course feedback,the platform has been unanimously praised,which can significantly improve students'theoretical learning ability,innovation ability,and exploration consciousness.
万方数据
维普
