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引用本文:

DOI:

10.11834/jrs.20210369

收稿日期:

2020-08-25

修改日期:

2021-05-18

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高分卫星地面处理系统研制建设
王冰冰, 喻文勇, 龙小祥, 林军, 王海波, 宋超宇, 陈琦, 葛曙乐, 李帅
中国资源卫星应用中心
摘要:

高分卫星地面处理系统是高分辨率对地观测系统重大专项的重要组成部分,实现高分1-7号卫星各载荷数据录入、各级标准产品生产、存档、仿真、评价、分发服务、定标检校以及有效载荷管理等。地面处理系统采用了基于HADOOP平台的计算与存储统一的云计算地面处理架构,通过HDFS分布式文件系统将节点内部存储聚合为海量数据存储系统,通过YARN资源管理系统实现海量数据的统一调度和大规模并行处理,结合多光谱、高光谱、红外、微波、激光雷达和大气探测等多种卫星遥感数据高精度处理算法,构建多星通用大数据综合处理平台,大幅提升数据综合处理、数据存储与管理、分发服务等能力,为各类用户提供高精度、高质量的标准数据产品。

Development and construction of high-resolution satellites ground processing system
Abstract:

Objective: The ground processing system of the high-resolution satellites is an important component of the High-resolution Earth Observation System. Following the principles of standardization, safety and reliability, maintainability, economy and advanced technology, it aims to design and develop a remote sensing data comprehensive processing platform,which can realize the functions of data ingestion, multi-level standard data production, archiving, simulation, evaluation, distribution services, radiometric and geometric calibration, observation management of the payloads on GF-1~7 satellites. Method: The ground processing system adopts the cloud computing ground processing architecture based on the HADOOP platform, and integrates the internal storage of nodes into a massive data storage system through the HDFS distributed file system. It also realizes the united scheduling and large-scale parallel processing of massive data through the Yarn resource management system. What’s more, it studies and develops the high-precision processing algorithms of the multi-spectral, hyper-spectral, infrared, microwave, lidar and atmosphere detection payloads on the satellites. Result: The high-resolution satellite ground processing system builds a multi-satellite comprehensive processing platform for massive satellite data. The capabilities of the ground processing system have been substantially improved in data integrated processing, data storage and management, data distribution services and provides the standard data products to the users with high accuracy and quality. It has 400 trillion calculations per second and highly automated data processing capacity of more than 20TB per day. It can process a wide range of satellite payload types for GF-1~7 satellites. In the normal mode, the data processing time of each orbit is not more than 2 hours, and the emergency processing time is not more than 45 minutes. The system has 25PB scalable storage and management capabilities of massive remote sensing image data. The products are stored online and near line within two years, and level 0 data is permanently archived. As for the data distribution, the system has the ability to distribute no less than 4 million scene data every year, and supports 1000 external users to visit and retrieve the data on the service website at the same time. The average retrieval response time is less than 10 seconds. It also supports 200 external users to download data products online. The system has the continuous operation ability of 7×24 hours. The operation stability is better than 99%. The main and backup switch of key business equipment is completed within 10 minutes after the failure. The mean time to repair is 4 hours. Conclusion: The high-resolution satellite ground processing system has realized satellite data ingestion, standard product processing, archiving, simulation, evaluation, distribution, calibration, payload management and data sharing services. It has also realized the comprehensive data processing of a wide range of remote sensing data, which covers optical, sub-meter high spatial resolution, multi-mode radar, geosynchronous orbit, hyperspectral resolution, atmospheric, stereo mapping, lidar earth observation and so on. A multi-satellite and multi-load remote sensing data product system has been established to provide multi-source remote sensing data for land, ocean, agriculture, disaster reduction, forestry, water conservancy, environment, earthquake, meteorology, transportation, surveying and mapping users. It has played an important role in promoting China"s economic construction, social development, scientific and technological progress and serving China"s Belt and Road Initiatives.

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