The Operation and Service of National Land Satellite 1

Korean National Land Satellite 1 has been launched with a mission to map national geospatial information and to monitor land resource and disasters on March 22, 2021. The satellite has a precise optical payload of 5 multi-spectral bands (Pan, R, G, B, and NIR). It observes the ground of 12 kilometers width at a 0.5m GSD (Ground Sample Distance) mainly over the Korean Peninsula and global areas of interest during at least four years.

The product of National Land Satellite is classified to 4 levels: Basic geometry image based on initial satellite position (Level 1); Precise Ortho-rectified image (Level 2);

Reproduced 2D/3D information only with Level 2 (Level 3); and Reproduced 2D/3D information with Precise image(Level 2/3) and other spatial information (Level 4). As the first 0.5m-scale satellite, Level 1 and Level 2 products are open and accessible to the Korean public. In case of Level 2 product, the average location accuracy shows about 1~4m in Korea, depending on the number of available Ground Control Points (GCP) and Level 2 product will produce North Korea Digital Map at 1:5,000 scale. The level 3 and level 4 will be serviced to the public in stage from 2023. The Korea national land satellite can be used to monitor disaster damage, especially for monitoring climate change caused by increasing greenhouse gas emissions through increasing plastic waste. In addition, it is expected that it can be used to generate high value-added spatial information such as 3D spatial information through convergence between various spatial information and land satellite information.

 

Acknowledgment: This work was supported by Ministry of Land, Infrastructure and Transport (MOLIT) of Korean government and Korea Environment Industry & Technology Institute (KEITI) through Plastic-Free Specialized Graduate School funded by Korea Ministry of Environment (MOE).

Keywords : #National Land Satellite, #CAS500, #High resolution, #0.5m, #Diaster #plastic waste #climate change