CAJ | 학술논문

基于仿真模型对圆锥扫描星载微波成像仪不同频率和极化二维天线方向图地面足迹的模拟，对FY3卫星微波成像仪（MWRI）原始观测轨道亮温数据，用Backus—Gilbert（BG）分辨率匹配算法分别对分辨率降低（高频通道匹配到低频通道）和分辨率增强（低分辨率匹配到高分辨率）进行了实验分析。结果表明：分辨率降低匹配处理能较好地模拟实际仪器观测，且不另引入噪声，可在MwRI通道分辨率匹配中实际应用；分辨率增强匹配可明显提高低频图像分辨率，但会一定程度引入噪声，实际应用中应考虑在分辨率增强与噪声间进行折中处理，在增强分辨率的同时，使引入的噪声在可接受范围内。
기우방진모형대원추소묘성재미파성상의불동빈솔화겁화이유천선방향도지면족적적모의，대FY3위성미파성상의（MWRI）원시관측궤도량온수거，용Backus—Gilbert（BG）분변솔필배산법분별대분변솔강저（고빈통도필배도저빈통도）화분변솔증강（저분변솔필배도고분변솔）진행료실험분석。결과표명：분변솔강저필배처리능교호지모의실제의기관측，차불령인입조성，가재MwRI통도분변솔필배중실제응용；분변솔증강필배가명현제고저빈도상분변솔，단회일정정도인입조성，실제응용중응고필재분변솔증강여조성간진행절중처리，재증강분변솔적동시，사인입적조성재가접수범위내。
Based on the simulation of the ground footprint with various frequency and polarization two-dimension pattern of space-borne microwave radiation imager （MWRI） with corn scanning by the model, the Backus-Gilbert resolution matching algorithm was used to the experiment of resolution decreasing （from high frequency channel to low frequency channel） and resolution increasing （from low frequency channel to high frequency channel） for Bright temperature data of MWRI for FY 3 satellite in this paper. The results showed that the matching with resolution decreasing could simulate the real instrument observation without introducing noise, which could be applied in the channel resolution matching of MWRI, the resolution of low frequency image could be improved by the resolution increasing matching but with introducing some noise. The compensation should he considered between the resolution increasing and noise in real application, which made the noise introduced acceptable while the resolution increased.