Optimised limit for polarimetric calibration of fully polarised SAR systems

被引：1

作者：

Chen, Jie ^{[1
,2
]}

Guo, Wei ^{[2
]}

Li, Zhuo ^{[1
,2
]}

Liu, Wei ^{[3
]}

机构：

[1] Collaborat Innovat Ctr Geospatial Technol, Wuhan 430079, Peoples R China

[2] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China

[3] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S10 2TN, S Yorkshire, England

来源：

ELECTRONICS LETTERS | 2016年 / 52卷 / 09期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

synthetic aperture radar; crosstalk; radar polarimetry; polarimetric calibration; fully polarised SAR systems; fully polarised synthetic aperture radar systems; cross-talk; channel imbalance; system noise; backscatter model; RADAR CALIBRATORS; FARADAY-ROTATION;

D O I：

10.1049/el.2015.3971

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The optimised limit for polarimetric calibration of fully polarised synthetic aperture radar systems is derived by establishing an error model as a function of cross-talk, channel imbalance and system noise. Compared with noise equivalent sigma zero, the polarimetric error below the optimised limit is too small to affect the signal of cross-polarised channel. Thus, polarimetric calibration could be relaxed or even ignored in this case. With the backscatter model, optimised limits for cross-talk and channel imbalance at X, C and L-bands are presented. Moreover, when ignoring channel imbalance, the limit for cross-talk is given in a quantitative way. These results are very useful in practice, allowing significant reduction in calibration cost.

引用

页码：763 / 764

页数：2

共 8 条

[1] CALIBRATION OF SPACEBORNE LINEARLY POLARIZED LOW FREQUENCY SAR USING POLARIMETRIC SELECTIVE RADAR CALIBRATORS
Chen, J.
Quegan, S.
Yin, X. J.
[J]. PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER, 2011, 114 : 89 - 111
[2] Calibration of Spaceborne CTLR Compact Polarimetric Low-Frequency SAR Using Mixed Radar Calibrators
Chen, Jie
Quegan, Shaun
[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2011, 49 (07): : 2712 - 2723
[3] Improved Estimators of Faraday Rotation in Spaceborne Polarimetric SAR Data
Chen, Jie
Quegan, Shaun
[J]. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2010, 7 (04) : 846 - 850
[4] Polarimetric optimisation in radar interferometry
Cloude, SR
Papathanassiou, KP
[J]. ELECTRONICS LETTERS, 1997, 33 (13) : 1176 - 1178
[5] The Impact of System Effects on Estimates of Faraday Rotation From Synthetic Aperture Radar Measurements
Quegan, Shaun
Lomas, Mark R.
[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2015, 53 (08): : 4284 - 4298
[6] Requirement on Antenna Cross-Polarization Isolation for the Operational Use of C-Band SAR Constellations in Maritime Surveillance
Touzi, R.
Vachon, P. W.
Wolfe, J.
[J]. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2010, 7 (04) : 861 - 865
[7] Ulaby Fawwaz T, 1989, Handbook of Radar Scattering for Terrain
[8] Using cross-entropy for polarimetric radar discrimination problem
Xu, JY
Yang, J
Peng, YN
Wang, C
[J]. ELECTRONICS LETTERS, 2002, 38 (12) : 593 - 594

← 1 →