本文選題：SAR　切入點：CCMP　出處：《遙感技術(shù)與應(yīng)用》2016年06期 　論文類型：期刊論文

【摘要】：首先獲取覆蓋浙江省近海215景長時間序列多模式ASAR Level 1B數(shù)據(jù),對獲取的ASAR數(shù)據(jù)進行幾何校正、輻射定標(biāo)、極化比轉(zhuǎn)化、噪聲剔除后,將所有的影像統(tǒng)一重采樣得到1km×1km分辨單元的后向散射系數(shù)影像,嘗試?yán)肅CMP風(fēng)向作為SAR風(fēng)速反演地球物理模式函數(shù)的風(fēng)向初始場,對比目前國際上最常用的3種模式函數(shù)CMOD4、CMOD-IFR2和CMOD5的風(fēng)速反演效果,將反演得到風(fēng)速分別與CCMP插值風(fēng)速和現(xiàn)場觀測氣象站點的風(fēng)速進行對比,結(jié)果表明CCMP風(fēng)向數(shù)據(jù)可作為SAR風(fēng)速反演的風(fēng)向初始場,其中結(jié)合CMOD4模式函數(shù)能夠得到較高精度的反演風(fēng)速,由于CCMP數(shù)據(jù)有效時間長、覆蓋范圍廣、易于獲取,因此聯(lián)合CCMP風(fēng)向有利于SAR近海風(fēng)場反演的業(yè)務(wù)化應(yīng)用。
[Abstract]:Firstly, the multimode ASAR Level 1B data covering 215 times offshore of Zhejiang Province are obtained. After geometric correction, radiometric calibration, polarization ratio conversion and noise elimination, the obtained ASAR data are calibrated. The backscattering coefficient images of 1km 脳 1km resolution unit are obtained by the unified resampling of all the images. The initial wind direction field of the geophysical model function is retrieved by using the CCMP wind direction as the SAR wind speed function. By comparing the results of wind speed inversion of CMOD4 CMOD-IFR2 and CMOD5, the wind speed obtained from the inversion is compared with that of CCMP interpolation wind speed and field observation meteorological station, respectively. The results show that the CCMP wind direction data can be used as the initial wind direction field of SAR wind speed inversion. The wind speed inversion can be obtained by combining the CMOD4 model function. Because of the long effective time and wide coverage of CCMP data, it is easy to obtain. Therefore, the combination of CCMP wind direction is beneficial to the operational application of SAR offshore wind field inversion.
【作者單位】： 浙江大學(xué)遙感與信息技術(shù)應(yīng)用重點實驗室;杭州師范大學(xué)遙感與地球科學(xué)研究院;浙江省氣候中心;
【基金】：公益性行業(yè)(氣象)科研專項“多源測風(fēng)資料融合技術(shù)研究及其在風(fēng)能資源評估中的應(yīng)用”(GYHY201306050) 浙江省科技計劃項目“近海面風(fēng)場遙感協(xié)同反演方法研究及其應(yīng)用”(2013C33068)
【分類號】：P714.2;P715.7

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