Key Points Analysis and Simulation for Sea Surface Velocity Estimation Based on Spaceborne ATI-SAR System

doi:10.16182/j.issn1004731x.joss.201810032

Abstract

Abstract: ATI (Along Track Interferometric) technique is one of the most important applications for spaceborne SAR (Synthetic Aperture Radar) systems. ATI-SAR systems can directly detect the Doppler offset associated with each pixel of a SAR image. This is achieved by interferometric combination of two complex SAR images of the same scene. The sea surface velocity can be estimated via the calculated interferometric phase. The baseline length, velocity resolution and velocity estimation error are three important factors in the process of spaceborne ATI-SAR system design, and these three points are carefully investigated here. The basic principle and expression of spaceborne ATI-SAR system are presented. The selection method of baseline length is discussed. The velocity resolution is studied, as well as the velocity estimation error. Some conclusions are drawn to play an important role in future spaceborne ATI-SAR system design.

Key words: spaceborne synthetic aperture radar, along track interferometric, sea surface velocity estimation, error analysis

CLC Number:

TP391.9

Yan He, Zhu Daiyin. Key Points Analysis and Simulation for Sea Surface Velocity Estimation Based on Spaceborne ATI-SAR System[J]. Journal of System Simulation, 2018, 30(10): 3861-3869.

References

[1] Roland R, Hartmut R.Theoretical Evaluation of Several Possible Along-Track InSAR Modes of TerraSAR-X for Ocean Current Measurements[J]. IEEE Transactions on Geoscience and Remote Sensing (S0196-2892), 2013, 45(1): 21-35.
[2] Roland R, Judith S, Detlef S.Global Current Measurements in Rivers by Spaceborne Along-Track InSAR[C]// 2005 IEEE Radar Conference. USA: IEEE, 2005: 71-74.
[3] Stephen J F, Adriano J C.Dual-Beam Interferometry for Ocean Surface Current Vector Mapping[J]. IEEE Transactions on Geoscience and Remote Sensing (S0196-2892), 2014, 39(2): 401-414.
[4] Roland R, Donald R T.Numerical Study on the Along-Track Interferometric Radar Imaging Mechanism of Oceanic Surface Currents[J]. IEEE Transactions on Geoscience and Remote Sensing (S0196-2892), 2013, 38(1): 446-458.
[5] Antonio M, Giancarlo R.Spaceborne Along-Track SAR Interferometry: Performance Analysis and Mission Scenarios[J]. IEEE Transactions on Aerospace and Electronic Systems (S0018-9251), 2001, 37(1): 199-213.
[6] 田斌, 朱岱寅, 吴迪, 等. 稳健的多通道SAR/GMTI 通道盲均衡算法[J]. 电子学报, 2014, 42(3): 424-431.
Tian Bin, Zhu Daiyin, Wu di, et al. Robust Channel Blind Equalization Algorithm for Multi-Channel SAR/GMTI System[J]. Acta Electronica Sinica, 2014, 42(3):424-431.
[7] Eduaro M, Antoni B, Josep R, et al.A Performance Evaluation of SAR-GMTI Missions for Maritime Applications[J]. IEEE Transactions on Geoscience and Remote sensing (S0196-2892), 2015, 53(5): 2496-2509.
[8] Liu B C, Yin K Y, Li Y K, et al.An Improvement in Multichannel SAR-GMTI Detection in Heterogeneous Environments[J]. IEEE Transactions on Geoscience and Remote sensing (S0196-2892), 2015, 53(2): 810-827.
[9] Eduaro M, Stefan V B, Marc J, et al.Multichannel SAR-GMTI in Maritime Scenarios with F-SAR and TerraSAR-X Sensors[J]. IEEE Journal of Selected Topics in Applied earth Observations and Remote Sensing (S1939-1404), 2015, 8(11): 5052-5067.
[10] Yan H, Zhu D Y, Wang R, et al.Practical Signal Processing Algorithm for Wide-area Surveillance-GMTI Mode[J]. IET Radar, Sonar & Navigation (S1751-8784), 2016, 9(8): 991-998.
[11] 黄大荣, 孙光才, 吴玉峰, 等. 三通道TOPSAR-GMTI 技术研究[J]. 电子与信息学报, 2013, 35(1): 41-48.
Huang Darong, Sun Guangcai, Wu Yufeng, et al.Research on Three-channel TOPSAR-GMTI Technology[J]. Journal of Electronics & Information Technology, 2013, 35(1): 41-48.
[12] 张佳佳, 周芳, 孙光才, 等. 基于前向阵雷达的三通道地面快速动目标检测与成像方法[J]. 电子与信息学报, 2013, 35(1): 8-14.
Zhang Jiajia, Zhou Fang, Sun Guangcai, et al.Approach for Ground Fast-moving Target Detection and Imaging Based on the Three-channel Forward-looking Radar[J]. Journal of Electronics & Information Technology, 2013, 35(1): 8-14.
[13] Howard A Z, John V.De-correlation in Interferometric Radar Echoes[J]. IEEE Transactions on Geoscience and Remote Sensing (S0196-2892), 1992, 30(5): 950-959.