Design And Implementation Of Satellite Data Porduct Library System Based On J2EE

Space science satellite data products are the direct output of science satellite missions.The quantitative description and non repeatability of the characteristics of the outer space science exploration objects make science satellite data products have great research value.This paper introduces the idea of product data management into the satellite data product management,and realizes the satellite date product library management system.On the one hand,it helps the operation and maintenance personnel to grasp the overall situation of the data products,and timely find and deal with anomalies;On the other hand,it helps researchers to easily obtain data products and understand their key features.In order to realize the satellite data product library management system,this paper starts from the following two aspects:the structure design of satellite data products and the scientific management of satellite data products.Firstly,by analyzing the characteristics of satellite data products and combining with the concepts and methods of archival science,this paper designs two main structures of data products and data sets.Furthermore,combining the above structure with the corresponding management requirements and methods,two moduls of the system design are determined:data product management module and data set management module.In the data product management module,the focus is on the metadata management of data products.Therefore,this paper implements the metadata extraction method based on rule template and the metadata dynamic expansion method based on annotation tree.In the data set management module,the batch update of product files is the key problem.Therefore,this paper proposes the concept of logical address,and combined with matching rules to realize the rapid batch update of product files of data set.Then,a system prototype is implemented,and the above modules are integrated and deployed.In the process of software integration and deployment,the concept of resource number and task is proposed and applied,which makes full use of the computing resources of the server and improves the system experience.Finally,the performance and interface of the system prototype are tested,and the results show that the data product library management system can better meet the needs of scientific management of data products.