Analysis of InSAR time-series deformation monitoring accuracy of domestic satellite

doi:10.11947/j.AGCS.2024.20230572.

Abstract

Abstract:

The successful launch of the Lutan-1 satellite group (LT-1) has achieved the development of China's L-band interferometric SAR satellite from scratch. For obstacle avoidance, a small part of the spatial baselines of LT-1 satellite was long, but the length of the baseline has been controlled to within 400 meters after the orbit adjustment. In order to verify the availability and accuracy of LT-1 satellite data, this article takes the Datong mining area in Shanxi Province as an example and obtains 25 LT-1 strip pattern image data from December 23, 2022 to May 20, 2023, respectively, for SBAS-InSAR and PS-InSAR data processing. By comparing and analyzing the deformation monitoring results of time-series InSAR and GPS stations in the light of sight, the standard deviations of the two are 5.7 mm/a (SBAS-InSAR) and 3.4 mm/a (PS-InSAR), respectively. The root mean square error of the time series is less than 5 mm, indicating high consistency. The research has shown that domestically produced LT-1 satellites have high-precision deformation monitoring capabilities, providing reliable data assurance for domestic terrain surveying and deformation monitoring.

Key words: Lutan-1, time-series InSAR, CSU-InSAR, accuracy analysis

CLC Number:

P236

Bing XU, Yan ZHU, Zhiwei LI, Huiwei YI, Miaowen HU, Qi CHEN, Kun HAN, Xun DU. Analysis of InSAR time-series deformation monitoring accuracy of domestic satellite[J]. Acta Geodaetica et Cartographica Sinica, 2024, 53(10): 1930-1941.

Figures/Tables 15

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站点名	经度/(°E)	纬度/(°N)	站点名	经度/(°E)	纬度/(°N)	站点名	经度/(°E)	纬度/(°N)
GP01	112.90	39.99	GP19	113.10	40.11	GP37	112.88	40.00
GP02	112.90	40.03	GP20	112.90	40.00	GP38	112.93	39.88
GP03	112.96	39.97	GP21	112.91	39.99	GP39	113.04	40.06
GP04	112.93	39.97	GP22	112.88	39.98	GP40	113.07	40.09
GP05	112.88	39.97	GP23	112.87	40.02	GP41	113.06	40.07
GP06	112.92	39.96	GP24	112.99	40.00	GP42	112.95	39.96
GP07	112.94	39.95	GP25	113.04	40.07	GP43	113.12	40.08
GP08	112.93	39.95	GP26	113.04	40.07	GP44	113.03	40.10
GP09	112.95	39.94	GP27	112.91	39.96	GP45	113.02	40.09
GP10	113.06	40.10	GP28	112.86	39.94	GP46	113.04	40.07
GP11	113.05	40.09	GP29	112.89	39.95	GP47	113.04	40.06
GP12	113.09	40.08	GP30	112.87	39.93	GP48	113.14	40.07
GP13	112.91	40.01	GP31	112.90	39.88	GP49	113.09	40.05
GP14	112.90	40.05	GP32	112.93	39.88	GP50	113.08	40.10
GP15	112.91	40.03	GP33	112.86	39.92	GP51	113.13	40.10
GP16	112.97	40.02	GP34	112.92	40.02	GP52	113.11	40.09
GP17	112.94	40.01	GP35	112.91	40.02
GP18	112.94	40.00	GP36	112.92	40.01

序号	点号	STD/mm	序号	点号	STD/mm
1	GP16	2.13	11	GP02	0.90
2	GP24	3.01	12	GP04	1.33
3	GP28	1.31	13	GP05	1.98
4	GP29	1.49	14	GP06	2.32
5	GP30	1.28	15	GP07	0.94
6	GP31	1.38	16	GP08	1.48
7	GP32	3.23	17	GP09	1.73
8	GP44	0.77	18	GP13	1.40
9	GP45	1.65	19	GP37	2.32
10	GP01	1.62	20	GP50	1.20

站点名	GPS	InSAR	差异	站点名	GPS	InSAR	差异	站点名	GPS	InSAR	差异
GP01	-6.8	-10.7	3.9	GP19	-24.6	-23.8	-0.8	GP35	-3.9	-2.6	-1.3
GP02	-5.6	-6.5	0.9	GP20	-16.0	-16.5	0.5	GP36	-5.7	-3.6	-2.1
GP04	-24.5	-16.6	-7.9	GP21	10.7	10.7	0.0	GP37	-26.2	-26.3	0.1
GP05	-16.2	-12.0	-4.2	GP22	-4.5	-6.3	1.8	GP38	8.1	6.3	1.8
GP06	-39.9	-36.6	-3.3	GP23	-9.8	-7.6	-2.2	GP39	-11.3	-20.3	9.0
GP08	-40.9	-28.9	-12.0	GP24	-22.0	-16.2	-5.8	GP40	-3.0	-2.1	-0.9
GP09	-23.1	-0.2	-22.9	GP25	-9.5	-12.3	2.8	GP41	16.6	21.0	-4.4
GP10	-115.5	-120.8	5.3	GP26	-1.5	-5.0	3.5	GP42	-25.2	-25.1	-0.1
GP11	-37.5	-38.1	0.6	GP27	-66.9	-63.8	-3.1	GP43	-11.2	-17.7	6.5
GP12	2.0	1.5	0.5	GP28	-2.1	-1.1	-1.0	GP46	-20.6	-21.6	1.0
GP13	-3.2	-7.3	4.1	GP29^*	0.0	0.0	0.0	GP47	-17.2	-15.6	-1.6
GP14	13.1	13.2	-0.1	GP30	-11.9	-12.2	0.3	GP48	-40.4	-33.0	-7.4
GP15	-8.7	-8.5	-0.2	GP31	-24.6	-6.6	-18.0	GP49	-4.6	2.3	-6.9
GP16	-28.6	-15.9	-12.7	GP32	2.5	6.3	-3.8	GP50	-7.2	-6.0	-1.2
GP17	-21.5	-16.1	-5.4	GP33	-1.7	-2.1	0.4	GP51	-5.6	-8.4	2.8
GP18	1.6	7.4	-5.8	GP34	0.5	0.1	0.4	GP52	-7.6	-8.0	0.4

站点名	GPS	InSAR	差异	站点名	GPS	InSAR	差异
GP01	-6.8	-3.5	-3.3	GP21	10.7	9.2	1.5
GP02	-5.6	-5.9	0.3	GP22	-4.5	0.8	-5.3
GP03	-66.6	-63.6	-3	GP23	-9.8	-11.2	1.4
GP04	-24.5	-28.6	4.1	GP24	-22	-25.4	3.4
GP05	-16.2	-19	2.8	GP28	-2.1	2.3	-4.4
GP06	-39.9	-41.8	1.9	GP29^*	0	0	0
GP08	-40.9	-37.3	-3.6	GP30	-11.9	-15.4	3.5
GP13	-3.2	-0.1	-3.1	GP33	-1.7	3.7	-5.4
GP14	13.1	17.8	-4.7	GP34	0.5	5.4	-4.9
GP15	-8.7	-12.9	4.2	GP35	-3.9	-1.3	-2.6
GP18	1.6	-1.5	3.1	GP36	-5.7	-9	3.3
GP20	-16	-13.9	-2.1	GP42	-25.2	-27.7	2.5

站点名	RMSE	站点名	RMSE	站点名	RMSE	站点名	RMSE	站点名	RMSE
GP01	0.7	GP13	1.5	GP23	1.9	GP33	1.5	GP43	1.5
GP02	0.8	GP14	2.2	GP24	2.1	GP34	1.2	GP46	1.8
GP04	2.5	GP15	1.1	GP25	1.5	GP35	1.1	GP47	2.0
GP05	1.3	GP16	3.4	GP26	1.9	GP36	1.2	GP48	1.9
GP06	1.5	GP17	1.9	GP27	2.9	GP37	2.1	GP49	1.8
GP08	2.4	GP18	1.4	GP28	1.4	GP38	2.0	GP50	0.9
GP09	4.3	GP19	1.2	GP29	0.9	GP39	2.9	GP51	1.1
GP10	3.1	GP20	1.0	GP30	1.9	GP40	0.7	GP52	0.8
GP11	1.1	GP21	1.8	GP31	2.9	GP41	2.7
GP12	1.2	GP22	1.1	GP32	2.3	GP42	2.1