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1. chinaXiv:201703.00294 [pdf]

Adaptive regularization method for forward looking Azimuth super-resolution of a Dual-Frequency Polarized Scatterometer

Liu, Liling; Dong, Xiaolong; Zhu, Jintai; Zhu, Di
Subjects: Geosciences >> Space Physics

Dual-Frequency Polarized Scatterometer (DFPSCAT) is a pencil-beam rotating scatterometer which is used to measure snow water equivalence (SWE). Respecting the low azimuth resolution of its forward-looking region, an adaptive regularization deconvolution super-resolution method, based on the scatterometer echo signal model, is proposed. Compared with the classical SIR and MAP algorithms, the proposed method can better reconstruct the original signal, and has less noise amplification. The algorithm processing accuracy with different Kpcis also studied, and the results show that when the value of Kpcis less than 0.1, nearly the entire restored data can satisfy the requirement of 0.5dB accuracy.

submitted time 2017-03-10 Hits1281Downloads665 Comment 0

2. chinaXiv:201703.00252 [pdf]

AN UNFOCUSED SAR APPROACH TO IMPROVE AZIMUTH RESOLUTION OF DUAL-FREQUENCY POLARIZED SCATTEROMETER(DFPSCAT)

Gang Wang; Xiaolong Dong; Qingliu Bao; Di Zhu; Xingou Xu
Subjects: Geosciences >> Space Physics

For the spaceborne scanning pencil-beam scatterometer, the azimuth resolution is low that could not meet the demands. Based on the motion of platform and the scanning rules of the spaceborne scatterometer, this paper takes an unfocused SAR approach to improve the Azimuth Resolution.

submitted time 2017-03-10 Hits890Downloads508 Comment 0

3. chinaXiv:201605.00289 [pdf]

AN UNFOCUSED SAR DESIGN TO IMPROVE AZIMUTH RESOLUTION OF DUALFREQUENCY FULL-POLARIZED SCATTEROMETER

Wang, Gang; Dong, Xiaolong; Bao, Qingliu; Zhu, Di; Xu, Xingou
Subjects: Geosciences >> Space Physics

In order to satisfy a high resolution for the measurement of snow water equivalent, we use the system of using the dual frequency(X-band 9.6GHz and Ku-band 17GHz) and full polarization. This paper discusses the various system options(scanning pencil-beam, high PRF, high SNR) and tradeoffs considered for improving the azimuth resolution of scatterometer are required.

submitted time 2016-05-03 Hits1567Downloads939 Comment 0

4. chinaXiv:201605.00281 [pdf]

ADAPTIVE REGULARIZATION METHOD FOR FORWARD LOOKING AZIMUTH SUPER-RESOLUTION OF A DUAL-FREQUENCY POLARIZED SCATTEROMETER

Liu, Liling; Dong, Xiaolong; Zhu, Jintai; Zhu, Di
Subjects: Geosciences >> Space Physics

Dual-Frequency Polarized Scatterometer (DFPSCAT) is a pencil-beam rotating scatterometer which is used to measure snow water equivalence (SWE). Respecting the low azimuth resolution of its forward-looking region, an adaptive regularization deconvolution super-resolution method, based on the scatterometer echo signal model, is proposed. Compared with the classical SIR and MAP algorithms, the proposed method can better reconstruct the original signal, and has less noise amplification. The algorithm processing accuracy with different K-pc is also studied, and the results show that when the value of K-pc is less than 0.1, nearly the entire restored data can satisfy the requirement of 0.5dB accuracy.

submitted time 2016-05-03 Hits1395Downloads791 Comment 0

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