Image and spectrum integration, precise and comprehensive | CAS Xiguang Hyperspectral Satellite Application System: Building a comprehensive satellite remote sensing big data sharing platform

CAS Xiguang Hyperspectral Satellite Application System

Integrated measurement, operation and control and application data system

Leveraging its leading domestic technological advantages and national-level resource advantages, CAS Xiguang continuously improves its commercial satellite industry chain layout. Based on its own hyperspectral remote sensing constellation, it has independently designed and developed China's first hyperspectral satellite data application system. This system includes a satellite remote sensing data application system, a satellite flight control and command center system, a satellite on-orbit mission planning system, a smart digital satellite system, a satellite operation status monitoring system, and a CAS Xiguang remote sensing constellation 3D visual simulation system.

By integrating the research and development of technologies such as automated processing, intelligent interpretation, and knowledge-based services of satellite remote sensing and big data, CAS Xiguang steadily promotes the coordinated development of satellite and big data application technologies and major projects, creating a satellite remote sensing big data sharing platform to provide commercial remote sensing data services to users worldwide.

Hyperspectral satellite remote sensing data

Integrated map and spectrum, accurate and comprehensive

Compared to traditional panchromatic and multispectral images, hyperspectral satellite remote sensing data offers advantages such as "integrated image and spectrum, and high precision and breadth," enabling more accurate monitoring of ground features. Based on the commercial integrated remote sensing microsatellite constellation system independently designed, developed, and operated by CAS Xiguang, it can provide global users with all-weather satellite remote sensing big data services with high spatial resolution, high temporal resolution, and high spectral resolution. It achieves ultra-high frequency image data acquisition and update capabilities, with a revisit cycle of up to 15 minutes for key global areas, forming a continuous monitoring capability for regional ecosystems, and providing high-frequency revisit monitoring of any target area across various industries.

For the reception and processing of hyperspectral satellite remote sensing data, CAS Xiguang independently designed a remote sensing satellite ground software application system to fully realize the functions of receiving, processing, managing, and distributing hyperspectral remote sensing images. According to the satellite observation plan, and with the satellite telemetry and control system providing telemetry and control support, it is responsible for receiving and recording remote sensing image data and auxiliary data transmitted from the satellite, performing image preprocessing and image application processing, generating image products of different levels and types, and interpreting, compiling, and organizing satellite remote sensing images to provide services for national economic construction and national defense.

▲Composition of Ground Software Application System

The functions of the remote sensing satellite ground software application system are mainly divided into two parts: the receiving service system, which is mainly responsible for receiving and archiving downlink data (ground station); and the ground service system (processing system), which is responsible for data processing and archiving, as well as product production and distribution services. The ground software application system modules mainly include six parts: data receiving and scene segmentation module, data preprocessing, data management and scheduling, geometric correction module, radiometric correction module, and data archiving and management module, deployed on six computing nodes respectively. The data archiving and management node is equipped with a database and storage array. Each major module can be further subdivided into 12 sub-modules: data acquisition, scene segmentation and cataloging, data integrity detection, data preprocessing, relative radiometric correction function, spectral SMILE correction function, radiometric correction, geometric correction, data archiving and management, scheduling and data distribution, and image fusion.

▲ Flowchart of Ground Software Application System

The remote sensing satellite ground software application system can receive raw data from satellite remote sensing ground stations, preprocess the raw data (radiometric correction, geometric correction, spectral SMILE correction, etc.), generate publishable products, and complete the archiving management and distribution of the products.

Satellite application services

Multiple uses: military, government, and civilian

Through effective means such as technological and management innovation, CAS Xiguang further improves efficiency, creating a remote sensing constellation and operational data operation based on low cost, near real-time, and high spectral resolution. The all-weather satellite remote sensing data it provides can be widely used in fields such as natural resource monitoring, reconnaissance and mapping, national defense and security, environmental monitoring, marine monitoring, agriculture and forestry, emergency management, smart city planning, meteorology and hydrology, disaster reduction and relief, major project monitoring, culture and art, finance and insurance, and Internet value-added services. It is suitable for various military, government, and civilian applications, and can fully meet the needs of various commercial remote sensing applications and data applications, providing higher-quality data information application services.

Today, ground-based satellite application systems have become an indispensable major scientific and technological infrastructure for the future development of satellites in my country. Zhongke Xiguang will continue to focus on user needs, further enhance research in the field of data application development technology, create low-cost, high-quality, and easy-to-use satellite application development solutions, and comprehensively assist various industries in my country to achieve accurate decision-making, precise governance, and refined management, thus ushering in a new era of satellite remote sensing applications.