收稿：2020-08-25，
纸质出版：2021-09-07
移动端阅览
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，实现高分一号到高分七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。
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
a remote sensing data comprehensive processing platform
which can realize the functions of data ingestion
multilevel standard data production
archiving
simulation
evaluation
distribution services
radiometric and geometric calibration
observation management of the payloads on GF-1 to GF-7 satellites
is designed and developed.
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. Moreover
it studies and develops the high-precision processing algorithms of the multispectral
hyper-spectral
infrared
microwave
Lidar
and atmosphere detection payloads on the satellites.
The high-resolution satellite ground processing system builds a multisatellite 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
and data distribution services; it provides standard data products to users with high accuracy and quality.
It has 400 trillion calculations per second and highly automated data processing capacity of more than 20 TB per day. It can process a wide range of satellite payload types for GF-1 to GF-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 25 PB scalable storage and management capabilities of massive remote sensing image data. The products are stored online and near line within the life cycle
and level 0 data are permanently archived.
For data distribution
the system can distribute more than four 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 switches of the key business equipment are completed within 10 minutes after the failure. The mean time to repair is 4 hours.
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 cover optical
submeter high spatial resolution
multimode radar
geosynchronous orbit
hyperspectral resolution
atmospheric
stereo mapping
and Lidar earth observation. A multisatellite and multiload remote sensing data product system have been established to provide multisource 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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