干涉合成孔徑雷達(dá)目標(biāo)的三維重建
3D reconstruction of targets in interferometeric SAR
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摘要: 干涉SAR目標(biāo)的三維重建是利用干涉SAR的基本測(cè)量值和干涉SAR成像的幾何關(guān)系確定地面目標(biāo)點(diǎn)的三維位置。現(xiàn)有算法均建立在平面電磁波、平地假設(shè)的基礎(chǔ)上,不可避免地引入嚴(yán)重的位置誤差。該文從干涉SAR的基本方程入手,在球形地球和球面電磁波的普遍模型基礎(chǔ)上,推導(dǎo)出干涉SAR三維重建的解析解,并將該算法與現(xiàn)有三維重建算法進(jìn)行了數(shù)值計(jì)算比較。
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關(guān)鍵詞:
- 目標(biāo)三維重建; 干涉合成孔徑雷達(dá); 平面波假設(shè)
Abstract: 3D reconstruction of targets in Interferometric SAR (InSAR) refers to determine targets 3D position based on principal measurements of radar and the InSAR imaging geom-etry. Several algorithms have boon proposed for InSAR. These algorithms rely on simplifying assumptions, such as the; flat oarth approximation and the plane wave approximation. Signifi-cant location errors of targets have been introduced by these approximations. In this paper, a new algorithm is proposed on the models of spherical earth and spherical wave. The solution is given in a closed form only using the measured quantities: orbit, parameters, range time, Doppler shift, and interferomotric phase. This analytical solution demonstrates more exact than the existing algorithms. -
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