Optimised limit for polarimetric calibration of fully polarised SAR systems. Issue 9 (4th April 2016)

• Record Type: Journal Article
• Authors: Chen, Jie; Guo, Wei; Li, Zhuo; Liu, Wei
• Is Part Of: Electronics letters. Volume 52:Issue 9(2016)
• Page Start: 763
• Page End: 764
• Publication Date: 2016-04-04
• Subjects: 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; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.3971
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : 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.