为避免双天线InSAR系统基线测量动态监测过程中引入误差，影响基线测量精度，对基线长度与角度测量过程中的可能误差进行定性与定量分析。采用坐标变换法建立系统误差数学模型，明确测量系统的误差来源。提出误差灵敏度概念，对误差项进行定量计算，并对每一自由度的误差源进行灵敏度分析，进一步形成综合误差定量合成结果。根据误差灵敏度系数给出一组精度反演误差分配案例。最后，依据蒙特卡洛法在MATLAB平台闭环验证精度量化分配方法的可行性与稳定性。仿真分析结果表明，激光视觉三轴位置的测量精度要求为300 μm（3σ），三轴角度的测量精度要求为50''（3σ），即可满足基线长度精度1 mm（1.6σ），基线角度精度2''（1.6σ）。通过本方法可由测量环境条件输入直接获得基线测量的精度，根据灵敏度系数对误差分配进行反演可以得到系统最优布局，其结果可为测量系统的方案设计与精度分解提供有效指导。

High resolution imaging is achieved using increasingly larger apertures and successively shorter wavelengths. Optical aperture synthesis is an important high-resolution imaging technology used in astronomy. Conventional long baseline amplitude interferometry is susceptible to uncontrollable phase fluctuations, and the technical difficulty increases rapidly as the wavelength decreases. The intensity interferometry inspired by HBT experiment is essentially insensitive to phase fluctuations, but suffers from a narrow spectral bandwidth which results in a lack of effective photons. In this study, we propose optical synthetic aperture imaging based on spatial intensity interferometry. This not only realizes diffraction-limited optical aperture synthesis in a single shot, but also enables imaging with a wide spectral bandwidth, which greatly improves the optical energy efficiency of intensity interferometry. And this method is insensitive to the optical path difference between the sub-apertures. Simulations and experiments present optical aperture synthesis diffraction-limited imaging through spatial intensity interferometry in a 100 nm spectral width of visible light, whose maximum optical path difference between the sub-apertures reaches 69λ. This technique is expected to provide a solution for optical aperture synthesis over kilometer-long baselines at optical wavelengths.