發(fā)布時間：2018-04-10 15:33

  本文選題：大氣校正 + 氣溶膠��； 參考：《光譜學(xué)與光譜分析》2016年05期

【摘要】：針對目前HJ-1CCD大氣校正沒有考慮中國地區(qū)氣溶膠模式的問題,提出一種耦合中國地區(qū)局部氣溶膠模式的大氣校正方法。以京津冀地區(qū)作為研究區(qū)域,該方法對地基北京城區(qū)和香河站點反演的氣溶膠模式參數(shù)進行聚類,得到京津冀地區(qū)具有代表性的四類氣溶膠模式,并根據(jù)四類氣溶膠模式來建立查找表進行氣溶膠光學(xué)厚度的反演。HJ-1CCD數(shù)據(jù)沒有短波紅外波段(2.12μm),無法采用MODIS的氣溶膠算法中獲得地表反射率的方法來計算藍紅波段的反射率,本文在氣溶膠光學(xué)厚度的反演中采用HJ-1衛(wèi)星的藍色(0.43~0.52μm)和紅色(0.63~0.69μm)波段的反射率比值作為誤差方程的依據(jù),不需要輸入地表目標(biāo)的反射率�；诜囱莺蟮墓鈱W(xué)厚度對HJ-1CCD數(shù)據(jù)進行大氣校正,并與ASD光譜輻射計測量數(shù)據(jù)以及MODIS地表產(chǎn)品數(shù)據(jù)(MOD09)進行對比。結(jié)果表明,該方法得到的大氣校正結(jié)果與ASD測量結(jié)果接近,并與MOD09有較強的相關(guān)性,紅色波段的平均相關(guān)系數(shù)達到了0.8以上,受氣溶膠影響最大的藍色波段平均的相關(guān)系數(shù)也達到了0.75左右。
[Abstract]:In view of the fact that the current HJ-1CCD atmospheric correction does not consider the aerosol model in China, an atmospheric correction method coupled with the local aerosol model in China is proposed.Taking the Beijing-Tianjin-Hebei area as the research area, this method is used to cluster the parameters of aerosol model retrieved from the ground-based Beijing urban area and the Xianghe station, and four representative aerosol models are obtained in the Beijing-Tianjin-Hebei region.According to four kinds of aerosol models, a look-up table is established to retrieve the aerosol optical thickness. HJ-1CCD data have no short-wave infrared band of 2.12 渭 m, so it is impossible to calculate the reflectivity of blue-red band by using the method of obtaining surface reflectivity in MODIS's aerosol algorithm.In this paper, the reflectivity ratios in the blue band of HJ-1 satellite and in the band of 0.63 ~ 0.69 渭 m) are used as the basis of the error equation in the inversion of aerosol optical thickness, and the reflectivity of the surface target does not need to be input.The atmospheric correction of HJ-1CCD data is carried out based on the inversion optical thickness, and compared with ASD spectral radiometer data and MODIS surface product data (MOD09).The results show that the result of atmospheric correction obtained by this method is close to that of ASD and has a strong correlation with MOD09. The average correlation coefficient of red band is more than 0. 8.The average correlation coefficient of blue band, which is most affected by aerosol, is about 0.75.
【作者單位】： 首都師范大學(xué)城市環(huán)境過程與數(shù)字模擬國家重點實驗室培育基地;首都師范大學(xué)三維信息獲取與應(yīng)用教育部重點實驗室;中國科學(xué)院遙感與數(shù)字地球研究所;
【基金】：國家自然科學(xué)基金項目(41401386)資助
【分類號】：X87

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