###### Abstract  
The LuTan-1 (LT-1) satellite, launched in 2022, is China's first L-band full-polarimetric Synthetic Aperture Radar (SAR) constellation, boasting interferometry capabilities. However, given its limited use in subsidence monitoring to date, a comprehensive evaluation of LT-1's interferometric quality and capabilities is necessary. In this study, we utilized the Differential Interferometric Synthetic Aperture Radar (DInSAR) technique to analyze mining-induced subsidence results near Shenmu City (China) with LT-1 data, revealing nine subsidence areas with a maximum subsidence of \(-19.6\) mm within 32 days. Furthermore, a comparative analysis between LT-1 and Sentinel-1 data was conducted focusing on the aspects of subsidence results, interferometric phase, scattering intensity, and interferometric coherence. Notably, LT-1 detected some subsidence areas larger than those identified by Sentinel-1, attributed to LT-1's high resolution, which significantly enhances the detectability of deformation gradients. Additionally, the coherence of LT-1 data exceeded that of Sentinel-1 due to LT-1's L-band long wavelength compared to Sentinel-1's C-band. This higher coherence facilitated more accurate capturing of differential interferometric phases, particularly in areas with large-gradient subsidence. Moreover, the quality of LT-1's monitoring results surpassed that of Sentinel-1 in root mean square error (RMSE), standard deviation (SD), and signal-to-noise ratio (SNR). In conclusion, these findings provide valuable insights for future subsidence-monitoring tasks utilizing LT-1 data. Ultimately, the systematic differences between LT-1 and Sentinel-1 satellites confirm that LT-1 is well-suited for detailed and accurate subsidence monitoring in complex environments. L 1 2024 16 281 1 1 The College of Earth and Planet Science, Chengdu University of Technology, Chengdu 610059, China; [EMAIL_ADDRESS] (F.Y. )1 The Visual Computing and Virtual Reality Key Laboratory of Sichuan Province, Sichuan Normal University, Chengdu 610068, China  
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[PERSON]  
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[PERSON]  
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1 The State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
measurements over extensive areas [5; 6; 7; 8; 9], enabling both qualitative and quantitative monitoring of mining-induced subsidence [10; 11; 12; 13]. Launched in January and February 2022, the LT-1 satellite, comprising two L-band multi-polarization SAR satellites, stands as China's first L-band full-polarimetric SAR satellite constellation dedicated to interferometry. Its chief aim is to monitor geological disasters across the nation, benefiting sectors such as geology, land and resources, surveying, disaster mitigation, and seismology [14; 15; 16]. L-band SAR satellites are notably advantageous for mining-induced subsidence monitoring and are anticipated to play a crucial role in future applications. Therefore, a comprehensive evaluation of the LT-1's mining-induced subsidence monitoring capacity is essential. Various SAR datasets, including the C-band Sentinel-1, X-band TerraSAR-X, and L-band ALOS-1/2, have been extensively applied in mining-induced subsidence results [17; 18; 19; 20; 21]. However, the use of LT-1 satellite data for this purpose is still emerging. [PERSON] and [PERSON] demonstrated the efficacy of LT-1 data in maintaining high interferometric performance and spatial resolution for long baselines [22] and its ability to effectively monitor mining-induced subsidence with high precision, particularly in detecting large deformation gradients [23]. However, they all focus on the subsidence result without considering the further comprehensive comparative analysis between LT-1 data and C-band Sentinel-1 data. This paper examines the mining areas in Shenmu City, Shaanxi Province, integrating two ascending track datasets from the LT-1 and Sentinel-1 satellites, spanning June to July 2023. Employing DInSAR technology, the study identifies nine subsidence hazard areas.