A method of weight determination based on the phase residual of ground control points to mitigate phase caused by orbital error in InSAR

doi:10.13474/j.cnki.11-2246.2019.0005

Abstract

Abstract: There are fringes caused by baseline in the interferogram even in flat area. This phase component is reference phase. At present, the common method of removing orbit error is to calculate the initial baseline based on the orbit state vector, and then the precision baseline is obtained by using the least square algorithm according to the information of the ground control points. Alternatively, fast Fourier transform or surface fitting is applied to get rid of the trend phase which is remained after the reference phase corresponding to the initial baseline is removed. Since the reference phase is eliminated before atmospheric delay phase and the deformation phase, the precision of baseline estimation is susceptible, which may affect the accuracy of deformation. Interferogram has a trend phase component after the reference phase is removed. Therefore, in this paper, a method of weight determination based on the phase residual of ground control points is proposed to improve the accuracy of baseline estimation. Simulation experiments and practical applications show that the method is effective and feasible.

Key words: InSAR, orbital error, ground control points, nonlinear least squares

CLC Number:

CHEN Xue, YANG Honglei, PENG Junhuan, FEI Xiangze, ZHAO Binbin, MA Jianguo, SONG Tunfang, ZHANG Wuyang. A method of weight determination based on the phase residual of ground control points to mitigate phase caused by orbital error in InSAR[J]. 测绘通报, 2019, 0(1): 23-28.

References

[1] 朱建军, 李志伟, 胡俊. InSAR变形监测方法与研究进展[J]. 测绘学报, 2017, 46(10):1717-1733.
[2] ZHANG L, WU J, DING X, et al. The propagation of orbital errors in the 3-pass DInSAR processing[C]//Conference on Synthetic Aperture Radar, 2007. Asian and Pacific.[S.l.]:IEEE, 2007:550-554.
[3] 杨红磊, 彭军还, 张丁轩,等. 轨道误差对InSAR数据处理的影响[J]. 测绘科学技术学报, 2012, 29(2):118-121.
[4] 王之栋, 唐新明, 李涛. InSAR时空基线对DEM精度的影响分析[J]. 测绘通报, 2018(2):61-66.
[5] BIGGS J, WRIGHT T, LU Z, et al. Multi-interferogram method for measuring interseismic deformation:Denali fault, Alaska[J]. Geophysical Journal of the Royal Astronomical Society,2010, 170(3):1165-1179.
[6] WANG T, JONSSON S. Phase-ramp reduction in intersei-smic interferograms from pixel-offsets[J]. IEEE Journal of Selected Topics in Applied Earth Observations & Remote Sensing, 2014, 7(5):1709-1718.
[7] ROSEN P A, HENSLEY S, PELTZER G, et al. Updated repeat orbit interferometry package released[J]. Eos Transactions American Geophysical Union, 2013, 85(5):47-47.
[8] KOHLHASE A O, FEIGL K L, MASSONNET D. Applying differential InSAR to orbital dynamics:a new approach for estimating ERS trajectories[J]. Journal of Geodesy, 2003, 77(9):493-502.
[9] PEPE A, BERARDINO P, BONANO M, et al. SBAS-based satellite orbit correction for the generation of DInSAR time-series:application to RADARSAT-1 data[J]. IEEE Transactions on Geoscience & Remote Sensing, 2011, 49(12):5150-5165.
[10] BÄHR H, HANSSEN R F. Reliable estimation of orbit errors in spaceborne SAR interferometry[J]. Journal of Geodesy, 2012, 86(12):1147-1164.
[11] WANG H, WRIGHT T J, BIGGS J. Interseismic slip rate of the northwestern Xianshuihe fault from InSAR data[J]. Geophysical Research Letters, 2009, 36(3):139-145.
[12] ZHANG L, DING X, LU Z, et al. A novel multitemporal InSAR model for joint estimation of deformation rates and orbital errors[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(6):3529-3540.
[13] LIU G, HANSSEN R F, GUO H, et al. Nonlinear model for InSAR baseline error[J]. IEEE Transactions on Geoscience and Remote Sensing, 2016, 54(9):5341-5351.
[14] 师悦龄,刘国祥,汤伟尧,等. 轨道误差对InSAR相位影响的BP神经网络去除法[J]. 测绘科学,2018(4):36-40.
[15] FERRETTI A, PRATI C, ROCCA F. Permanent scatterers in SAR interferometry[J]. IEEE Transactions on Geoscience & Remote Sensing, 2001, 39(1):8-20.
[16] BERARDINO P, FORNARO G, LANARI R, et al. A new algorithm for surface deforamtion monitoring based on small baseline dfferential SAR interferograms[J]. IEEE Transactions on Geoscience & Remote Sensing, 2002, 40(11):2375-2383.
[17] SMALL D, WERNER C, NUESCH D. Baseline modelling for ERS-1 SAR interferometry[C]//Geoscience and Remote Sensing Symposium.[S.l.]:IEEE, 1993:1204-1206.
[18] XU P. On robust estimation with correlated observa-tions[J]. Bulletin Géodésique, 1989, 63(3):237-252.
[19] XU P. Consequences of constant parameters and confidence intervals of robust estimation[J]. Boll. Geod. Sc. Affini, 1993,52(3):231-249.
[20] PENG J. Jointly robust estimation of unknown parameters and variance components based on expectation-maximization algorithm[J]. Journal of Surveying Engineering, 2009, 135(1):1-9.
[21] 张庆君. 高分三号卫星总体设计与关键技术[J]. 测绘学报,2017,46(3):269-277.