한국항공우주연구원
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Utilization of high value-added satellite information to improve public safety and quality of life.
Use of satellite information
From land management to disaster monitoring
KARI is currently controlling and operating the Arirang and Cheollian satellites, which are national satellite assets; it plans to manage and utilize systematically the integrated national satellite information to prepare for the multi-satellite era. The Institute is in charge of record planning, receiving, processing, and distributing images for the Arirang and Cheollian satellites; it is planning research and development to promote satellite image processing and utilization. Satellite images have recently been used as important big data that create high added value in the 4th Industrial Revolution era. KARI promotes the use of satellite images acquired from various satellites, including the world's best high-level resolution imaging satellites. The Arirang generates about 100,000 satellite images per year, including sub-meter high-resolution satellite images, radar images, and infrared images provided to the public and private sectors. The Cheollian continuously generates satellite images for meteorological, ocean, and environmental observations. These satellite images are crucial in various fields such as land management, disaster monitoring, marine water resource management, agricultural and forestry applications, environmental weather observation, national security, industrial activities, and daily life.Integrated satellite operation and efficient use of satellite information
KARI operates the National Satellite Information Utilization Support Center, a national organization for national satellites' integrated operation and promotion of systematic, efficient satellite information utilization. The National Satellite Information Utilization Support Center plays the role of enhancing the support and utilization system based on the private demand for satellite information to promote the use of various kinds of satellite information acquired by satellites, promoting the industries using satellite information and use services, and constructing the infrastructure for the satellite information utilization industry. The Center has formed the Satellite Information Utilization Council to supply satellite images to 31 government agencies to satisfy public demand according to the national mid- to long-term space development policy. Moreover, the Center builds the national satellite information integration database and platform so that the public and private sectors can readily use the national satellite data and enhance the added value of national satellite data to access satellite data easily.Satellite Information Utilization Council
KARI performs four major tasks through the operation of the council. First, it acquires and processes the satellite information required by the government council and produces and distributes standard and high value-added images. It also constructs and operates the information management system by acquiring Korean Peninsula images recorded by foreign satellites such as PeruSat-1. KARI has constructed a platform dedicated to using satellite information for the council by systematically implementing and enhancing the council operation support system and developing the order management system for the systematic management of the council's satellite information. Moreover, it operates the additional processing system it has implemented to produce high value-added information. It also operates the large-capacity database management system it has developed for the stable management of high value-added satellite information. KARI plans to develop commercialization technology for satellite information to help the council collaborating institutions utilize satellite information efficiently. It intends to secure technology that can analyze urban changes, forest damage, and farming land changes to support field service organizations. Moreover, it is developing tools to support the council users in checking and processing images.Lastly, it has organized a specialized group for each council's division to operate the council and provide user education. It is also holding use seminars and providing users' technical education to support the council's field service. Moreover, it holds workshops on utilizing satellite information and annual meetings to share satellite information utilization technology and know-how.Satellite utilization business
Stable supply of satellite images to meet national demand
The importance of operating the Arirang, a low-orbit, high-precision earth observation satellite, has increased to supply satellite images to meet national demand. In particular, as domestic and overseas users of low-orbit satellite images expand, user requirements are diversifying, and customized services and technical support for each user are required to satisfy the demands. KARI is planning, receiving, processing, and distributing satellite images to meet national demand and promote satellite image processing and satellite image utilization. It develops and operates an integrated order analysis system, a multi-satellite recording scheduling system, and a multi-satellite data processing system based on the use of satellite information to supply satellite images. Moreover, it conducts various studies for providing satellite images and related information to promote the use of domestic satellite images. KARI is diversifying satellite image products and developing multi-satellite image convergence technology and AI-based satellite image application technology to use satellite images and generate accurate information efficiently.Diversification of satellite image products
KARI is carrying out studies to diversify additional outputs effectively through user-friendly satellite image analysis to utilize satellite images' spectral information effectively. Its efforts include continuous observation and construction of ground towers to verify and improve satellite image products. It develops satellite image products with high utility, such as calculating surface information through atmospheric correction and computing the vegetation index, soil moisture, and cloud volume. KARI developed an AI-based cloud detection algorithm to remove clouds in images generated by the Arirang effectively. Finally, KARI plans to distribute new value-added output products generated by the Arirang to use satellite images more conveniently.Convergence of multiple satellite images
KARI is developing technology for the convergence of multi-sensor satellite images as well as a pre-processing algorithm required for the analysis of multi-sensor satellite images to utilize domestic and overseas satellite images. It is also developing the convergence of low-orbit and geostationary-orbit satellites to use the cloud information of geostationary-orbit satellite images for a low-orbit satellite recording plan. KARI is researching the core base technologies (PollInSAR high-density modeling, soil moisture estimation using the Arirang 5, mid-infrared channel separation analysis, etc.) necessary for the use of radar (SAR) and infrared (IR) images that exhibit different characteristics from optical satellite images.AI-based use of satellite images
Images recorded by the Arirang contain 15 types of objects such as vehicles, aircraft, ships, and roads. It is very difficult to identify these objects accurately and quickly with the human eyes. KARI is developing a satellite image analysis algorithm to detect objects quickly and accurately using AI instead of human analysts. It constructed a database for the research and verification of using AI for processing high-resolution images generated by the Arirang and overseas satellites. It is currently developing an object recognition algorithm to identify various objects such as ships, aircraft, vehicles, and buildings. Moreover, it researches and predicts various phenomena in land, atmosphere, and environment using satellite images.