Tiangong-2 application mission ground data processing and service system

Driven by the demand for effective data processing, archive management, quality analysis, and operational services, as well as the requirement that data applications utilize the payloads of Tiangong-2 with various mechanisms that are designed for advanced scientific experiments and earth observation, an integrated and ground-based data processing and service system with comprehensive support capabilities and intuitive technology features was developed. The system enables multisource and automated massive data-parallel processing. It has high-precision and high-quality production and enables efficient data archiving. It also facilitates visual management, data quality analysis, and control, online distribution services, and operation, etc. This paper (1) summarizes the current situation and development trend of ground processing and service systems for space data; (2) analyzes the technical requirements in processing, management, and sharing of space data for Tiangong-2 applications; (3) systematically introduces the overall architecture, operation processes, functions, and interfaces of the ground data system; (4) designs and implements in detail the functions of data -parallel processing and product production, visual-data storage and management, system scheduling and control, data quality analysis and control, and data online sharing services; (5) further analyzes key technical problems of high -precision data processing and concurrent dispatching of business processes for new earth observation payloads; and (6) elaborates the specific solutions. The system has been running steadily for 3 years and has provided more than 48 TB data products for researchers around the world. The ground data-processing system has played an important role in supporting scientific researches, outputs, and application promotion in various application fields of China Manned Space Engineering.