發(fā)布時(shí)間：2018-05-08 11:15

  本文選題：遙感 + 激光雷達(dá)　； 參考：《中國激光》2017年09期

【摘要】：為了有效確定地基激光雷達(dá)系統(tǒng)的幾何因子,修正地基激光雷達(dá)信號(hào)接收過渡區(qū)內(nèi)的回波信號(hào),提出了一種反演幾何因子的新方法。利用星載激光雷達(dá)(CALIPSO)可以覆蓋地基激光雷達(dá)探測(cè)過渡區(qū)的特點(diǎn),結(jié)合星載與地基激光雷達(dá)同步獲取的回波信號(hào),分別反演了離軸和同軸模式下的幾何因子,并同成熟的拉曼-米氏幾何因子反演方法,以及Su Jia的聯(lián)合測(cè)量法作對(duì)比。在幾何因子過渡區(qū)內(nèi),校正后的氣溶膠后向散射系數(shù)與Su Jia的方法相比,離軸和同軸模式下的平均相對(duì)誤差分別提高了25.4%和10.4%。該方法克服了彈性散射激光雷達(dá)水平測(cè)量法中因大氣均勻假設(shè)導(dǎo)致的幾何因子測(cè)量結(jié)果的不確定性,更適用于應(yīng)用廣泛的彈性散射激光雷達(dá),且可以利用CALIPSO每月過境時(shí)間穩(wěn)定的特點(diǎn),對(duì)系統(tǒng)幾何因子進(jìn)行常規(guī)標(biāo)定。
[Abstract]:In order to effectively determine the geometric factors of the ground-based lidar system and correct the echo signals in the transition region, a new method for retrieving the geometric factors is proposed. Based on the characteristic that spaceborne laser radar (CALIPSO) can cover the transition area of ground-based lidar detection, the geometric factors in off-axis and coaxial mode are inversed, respectively, according to the echo signals obtained simultaneously by spaceborne and ground-based lidar. The results are compared with the developed Raman-Mie geometric factor inversion method and Su Jia's combined measurement method. In the geometric factor transition region, the corrected aerosol backscattering coefficient increases by 25.4% and 10.4% respectively in off-axis and coaxial mode, compared with Su Jia's method. This method overcomes the uncertainty of the geometric factor measurement results caused by the assumption of atmospheric homogeneity in the elastic scattering lidar horizontal measurement method, and is more suitable for the widely used elastic scattering lidar. In addition, the system geometry factor can be calibrated regularly by using the characteristic of CALIPSO monthly transit time stability.
【作者單位】： 北京理工大學(xué)光電學(xué)院;
【基金】：國家自然科學(xué)基金青年科學(xué)基金(61505009)
【分類號(hào)】：TN958.98

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