And then the solutions for displacement mode of scattering wave at far field and scattering cross - section are provided at the interface cavity when it is ellipse and diamond 在求解了界面孔對sh波散射的近場解的基礎(chǔ)上,進(jìn)一步研究了其遠(yuǎn)場特性。給出了界面橢圓孔和方孔的遠(yuǎn)場位移模式和散射截面的解答。
Terrain slope information can be drawn from polarimetric synthetic aperture radar ( sar ) two - dimensional image , so that three - dimensional image can be generated . it differs from two - pass or repeated trace insar that uses interference phase method to obtain topography height . the p - sar three - dimensional image technology uses the stokes matrix formed by two - dimensional images resolution cells , then applying polarimetric synthesize to stokes matrix can produce polarization signature of the scatter cross - section a - ( , x ) for any ( ellipticity ) and ( orientation ) polarization state 這種方法不同于重復(fù)軌道和雙通道insar系統(tǒng),不是利用干涉法提取高度信息,而是利用極化sar二維圖像各分辨單元的stokes矩陣,通過極化綜合估計每個分辨單元的共極化散射特性和交叉極化散射特性(極化指紋) ,以及共極化散射特性最大值時對應(yīng)的極化橢圓度x利極化橢圓方向角,求解地形的高度輪廓。
百科解釋
The scattering cross-section, σscat, is a hypothetical area which describes the likelihood of light (or other radiation) being scattered by a particle. In general, the scattering cross-section is different from the geometrical cross-section of a particle as it depends upon the wavelength of light and the permittivity in addition to the shape and size of the particle.