Architecture Research Of Virtual Space Science Obsertatory

With the increasing development of space explorations technologies such as satellites, ground stations, weather balloons and sounding rockets and the promotion of national space programs like earth exploration, lunar exploration, planetary exploration, galactic and extragalactic observation, the research of space science is heading into the era of "data avalanche ". At the same time, the advent of data grid, cloud computing and other new technologies makes us much easier to achieve large-scale distributed data sharing in a collaborative environment. On the basis of the background, Virtual observatory emerges as the times require, and catches the attention and emphasis of the community of astronomical and space science.First, the paper first briefly describes the motivation, concept definition, application demand and development process of Virtual Observatory (VO), summarizes the current research progress of virtual observatory in astronomy and space science, proposes a classification method of Virtual Observatory architecture, and presents case study on the architecture of some typical Virtual Space Science Observatory.Moreover, based on the characteristics of applied research in space science, the paper analyzes the core problems of architecture design in detail, proposes five basic design principles for Virtual Space Science Observatory(VSSO), designs a data management model for space science, and finally presents an architecture for VSSO from conceptual framework, hierarchy, interaction protocols and service model.Besides, according to the result of VSSO theoretical research and the problems we encounter in satellite information system, the paper introduces the motivation of VSSO running engine, designs VSSO running engine based on MVC pattern. To implement the running engine, we divide VSSO running engine into four parts: framework, controller, viewer and model, ultimately form a reusable running engine of software implementation structures specifically for space science data model.Finally, on the basis of VSSO running engine, we design and implement VSSO systematic prototype including distributed database, portal service, resource registration service, resource discovery service, resource storage and access service, resource harvest and synchronization service, single-sign-on service, security service, science application service, describe the deployment of VSSO and present its application on space weather model computing,The practice and application results indicate that a VO established on the basis of the VSSO architecture proposed by this paper has certain universality in solving VO resources global discovery, metadata real-time synchronization, resource interoperability and data discovery based on space event association mining.