Requirements on the calibration of Hybrid-Compact SAR
Citations
66 citations
Cites background from "Requirements on the calibration of ..."
...This matter is not detailed here, but the interested reader can find useful hints in relevant literature [11], [12]....
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59 citations
Cites background from "Requirements on the calibration of ..."
...Unfortunately, the antenna technology of RISAT-1 does not allow the generation of a perfect circular polarization due to a phase shift that occurs during the quadrature phase combination of H and V polarizations to form the circular polarization [42]....
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19 citations
Cites background from "Requirements on the calibration of ..."
...As highlighted in [20], the non-circularity of the transmitted wave increases with incidence angle [21]....
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...It is well known that an AR of 0 dB indicates perfect circular, while values above 0 dB corresponds to elliptical, and values of infinity is linear polarization [20]....
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...[20], it is not possible to generate perfect circular polarization using current technology due to the phase errors in combining the horizontal and vertical with 90◦ phase difference when...
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...At the target, there might be an uncertainty associated with the actual transmitted wave, due to the non-circularity of a HP system in general, which was pointed out in [20] and tested in [14] for RI-1....
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..., [14,20] when discussing the non-circularity in general for a HP system....
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19 citations
11 citations
Cites methods or result from "Requirements on the calibration of ..."
...The received wave axial ratio may change with incidence angle as reported by [7]....
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...According to Touzi and Charbonneau [7], the present technology does not allow to generate perfect circular polarization due to phase errors in combining H and V waves with π/2 phase difference....
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References
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660 citations
"Requirements on the calibration of ..." refers background or methods in this paper
...The non circularity of the transmitted polarization is measured with the polarization axial ratio (AR) [11]; with AR = 0 dB for a “perfectly” AR = +∞ for a linear polarization....
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...It is also admitted that the non circularity of the transmitted wave increases with incidence angle [11]....
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490 citations
"Requirements on the calibration of ..." refers background or methods in this paper
...The Hybrid-Compact mode concept firstly introduced in the 1960th [1], [2], has been recently resuscitated [3], [4]....
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...More focus was assigned in [4] to the Compact mode with CP transmission....
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...The information provided by the hybrid Stokes vector parameters, and in particular the DoP (named m in [4]) and the channel phase difference, was shown to be very promising for target scattering classification [4], [6]....
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...This can be a significant advantage for operational use of Compact SAR in large swath applications [4], [6]....
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322 citations
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"Requirements on the calibration of ..." refers background in this paper
...Since one of the important aspect of Compact exploitation is polarization synthesis for the various received polarization, the requirements admitted for fully polarimetric (FP) SAR [12], [13], [5] can be adopted for the Compact....
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