## 5 Conclusions  
For this paper, we used time-series PS-InSAR technology to monitor and analyze deformation in the Jinchuan mining area in Jinchang City, using 15 scenes with \"Fucheng-1\" images and 5 scenes with \"Shenqi\" images. Currently, the research employing dual-star configurations for bistatic interferometric and time-series analysis remains limited, which establishes the significance of this study in quantitatively assessing the interferometric characteristics and time-series monitoring capabilities of the \"Fucheng-1\"/\"Shenqi\" dual-star constellation. The conclusions are presented as follows:  
1. The \"Fucheng-1\" and \"Shenqi\" SAR satellites, with their higher spatial resolution and shorter revisiting period characteristics, maintained a spatial vertical baseline within 70 m in this study. Compared to the Sentinel-1A satellite, the interferometric coherence exhibited similar temporally and spatially distributed characteristics, and the overall interferometric effect showed relatively clear improvements. In terms of time-series processing, the high-resolution characteristics of the dual-star constellation resulted in a denser monitoring point distribution, which stood out against the prominent consistency of the spatial deformation characteristics in the Sentinel-1A results. Overall, the calculation results align with the regional outcomes from Sentinel-1A, with certain mining areas demonstrating a relatively superior performance compared to the results obtained from Sentinel-1A.
2. Nine CR points were deployed in the Jinchuan mining area to verify the reliability of the results from \"Fucheng-1\" and \"Shenqi\". A comparison of CR-InSAR results with Sentinel-1A PS-InSAR results showed a relatively high degree of consistency in the monitoring outcomes.
3. We used \"Fucheng-1\" and \"Shenqi\" images from 21 November 2024, to 13 April 2025. Before 24 February 2025, only one \"Shenqi\" image was available. Most image revisiting periods were 11 days due to the limited number of \"Shenqi\" images. This caused decorrelation and unwrapping errors in some areas. To enhance the result accuracy, future work should maintain dual-star imaging and keep the temporal baseline within seven days.  
The results demonstrate that the \"Fucheng-1\" and \"Shenqi\" satellite constellation exhibits superior orbit control accuracy, enhanced bistatic interferometric capability, and improved time-series processing performance, with their high revisit frequency proving particularly advantageous in monitoring rapid mining subsidence, suggesting that their high-frequency and high-resolution characteristics should be fully utilized in future research and engineering applications to enhance the effectiveness of regional deformation monitoring.  
Writing--original draft, Z.G.; conceptualization, W.W.; methodology J.H. supervision, J.H., P.Z., G.Z. and Y.B.; writing--review and editing, N.M., Z.L. and W.R.; validation, J.G. All authors have read and agreed to the published version of the manuscript.  
This study was financially supported by the National Natural Science Foundation of China (Grant No. 42004006), the Natural Science Foundation of Hunan Province, China (Grant No. 2021)J40198), and the National Key R&D Program of China (Grant No. 2024 YFC3810500).  
The data presented in this study are available from the corresponding author upon reasonable request.  
Author [PERSON] was employed by the Spacety Co., Ltd. (Changsha). The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.