【摘要】 信噪比(SNR)作为评价遥感系统探测能力的一项关键指标,反映了遥感系统的灵敏度。信噪比的不确定度反映了仪器满足测量需求的信度水平。通过对航空多角度偏振辐射计(AMPR)工作原理的分析及其观测Stokes矢量与偏振度信噪比的讨论,提出了AMPR信噪比的不确定度数学模型。基于该模型,利用积分球对AMPR信噪比不确定度进行实验室验证。验证结果表明,当探测偏振度大于1%或2%时,AMPR信噪比不确定度分别不超过10%或5%(1?)。更多还原

【Abstract】 Signal-to-noise ratio(SNR) is a key parameter to evaluate the detection performance for a remote sensing system. A mathematical model to estimate the SNR uncertainty for aviation multi-angular polarimetric radiometer(AMPR) is proposed through analyzing the working principle of AMPR and discussing the SNRs of measured Stokes vectors and degree of polarization. Based on the proposed model, the AMPR SNR uncertainty has been validated in laboratory by using integrating sphere source. The experiment results indicate that the SNR uncertainty of AMPR is no more than 10% or 5%(1?) for the degree of polarization less than 1% or 2%, respectively.更多还原