## 7 Conclusions  
This study, centered on the mining area of Shenmu City in Shaanxi Province, integrated ascending track data from both the LT-1 and Sentinel-1 satellites. Utilizing DInSAR technology, we obtained mining-induced subsidence-monitoring results for the area. The LT-1 data identified nine areas of subsidence hazard, with the most significant subsidence reaching \(-19.6\) mm over 32 days. The study conducted a comparative analysis of LT-1 and Sentinel-1 data, analyzing subsidence monitoring results, interferometric phase, scattering intensity, and interferometric coherence. The principal findings are as follows:  
1. Superior interferometric performance of LT-1: The RMSE and SD for Sentinel-1 data are 2.5 and 8 times higher, respectively, than those for LT-1 data, and the SNR of LT-1 data is 7.4 times that of Sentinel-1. These metrics indicate the comprehensive superiority of LT-1 data in terms of interferometric phase-unwrapping results. Furthermore, the average subsidence measured along the AA' profile line is \(-8.2\) mm for LT-1 and \(-3.9\) mm for Sentinel-1, and the maximum subsidence is \(-16.8\) mm for LT-1 and \(-6.1\) mm for Sentinel-1. These metrics highlight the comprehensive superiority of LT-1 data in terms of interferometric phase-unwrapping accuracy. The higher resolution of the LT-1 imaging system contributes to a higher maximum detectable deformation gradient and more substantial subsidence results. The LT-1 data's L-band also provides higher coherence, enabling the detection of more significant subsidence signals. 2. Enhanced detection of deformation gradients: The interferometric fringes of LT-1 data display clear boundaries and complete visual representation, contrasting with Sentinel-1 data, which show more noise, blurred fringes, and lower quality. The MDDG of LT-1 is 69.4 mm/m, three times higher than that of Sentinel-1, indicating that LT-1 exhibits a larger detectable deformation gradient. This suggests that LT-1 data's interferometric phase provides a more precise representation of subsidence in particular areas, especially in detecting larger deformations. 3. Improved spatial resolution and scattering characteristics: Post-multi-looking, LT-1 data maintain a higher resolution than Sentinel-1. In high-reflectivity areas, such as buildings, LT-1's reflection intensity is approximately 1.1 times greater than Sentinel-1's. In areas of low reflectivity like vegetation, the stronger penetration capability of LT-1's L-band leads to a reflection intensity that is about 17.4 times higher than Sentinel-1's, signifying superior spatial distribution and density of scattering points in LT-1 data. 4. Significantly higher coherence: The proportion of LT-1 data with coherence greater than 0.6 is 36.19%, significantly exceeding Sentinel-1's 11.41%. The number of coherent pixels in LT-1 data with coherence above 0.6 is 121.1 times that of Sentinel-1, demonstrating the enhanced coherence provided by LT-1's L-band. The higher coherence facilitated more accurate capturing in large-gradient subsidence areas. 5. Advanced satellite performance metrics and applications: The LT-1 satellite's advanced performance metrics, including MDDR, MDDG, and orbital precision, offer considerable advantages for applications that demand high spatial/temporal resolution and precise deformation monitoring. LT-1 exhibits a superior ability to accurately detect relatively rapid deformation rates and significant deformation gradients. All the authors participated in editing and reviewing the manuscript. Writing--original draft, F.Y. ; Conceptualization, X.S. and K.D. ; methodology, W.Z., S.Y. and X.S. ; software, N.W. and J.D. ; data analysis, J.H., T.L., X.S., K.D., Y.Y. and R.Z. All authors have read and agreed to the published version of the manuscript. This work was supported in part by the National Key Research and Development Program of China (Grant No. 2021 YFB3901403), National Natural Science Foundation of China (Grant No. 42371462, No.