LuTan-1 Satellite-Based Geological Disaster Detection in Lingbao City, Western Henan of China

China’s monsoon climate makes it prone to geological disasters like landslides, especially from April to October. Henan Province, with 44.3% mountainous and hilly areas, is highly vulnerable, particularly in the western, northern, and southern highlands, northern plains, and eastern areas. These disasters have increased year-round due to climate change and human activities. The L-band Differential Interferometric Synthetic Aperture Radar (LT-1 01 constellation) was successfully launched in early 2022 and is widely applied in geological hazard monitoring. In this paper, a comprehensive deformation survey was conducted in Henan using LT-1 data (3-meter resolution). The process included three stages: deformation survey using D-InSAR on 1,763 high resolution LT-1 scenes (identifying 1,304 deformed areas, with only 158 coinciding with registered disaster points); deformation screening using SBAS on 700 LT-1 scenes; and detailed investigation in Lingbao City, identifying 14 new hazard sites. This paper provides an effective reference for domestic satellites to carry out large-scale geological disaster hazard identification tasks.