| 基于MODTRAN的ASTER通道星上光谱模拟 |
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| 引用本文： | 王楠,杨金中,陈圣波,周公器,于亚凤,项甜甜.基于MODTRAN的ASTER通道星上光谱模拟[J].地球科学,2015,40(8):1427-1431. |
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| 作者姓名： | 王楠 杨金中 陈圣波 周公器 于亚凤 项甜甜 |
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| 作者单位： | 1.吉林大学地球探测科学与技术学院, 吉林长春 130026 |
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| 基金项目： | 中国地质调查局项目12120113100100国家高技术研究发展计划(863计划)项目2012AA12A308国家高技术研究发展计划(863计划)项目2008AA121100国家自然科学基金项目41402293 |
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| 摘 要： | 由于轨传感器位置影响, 传感器接收的能量不完全来自地物的反射, 地面与传感器间大气辐射能量的作用同样不可忽略.通过中分辨率大气辐射传输模型(moderate resolution atmosphere transmittance and radiance code, MODTRAN)将辐射传输过程与传感器光谱响应函数进行耦合运算, 基于二长花岗岩、正长岩、石英正长岩及石英闪长岩的地面实测光谱数据及测量时大气和几何条件, 完成了4种岩性先进星载热发射和反射辐射仪(advanced spaceborne theemal emission and reflection radiometer, ASTER)通道星上光谱的模拟, 建立了实测光谱数据与星上光谱数据间的联系, 证明将地面与传感器间大气辐射影响耦合到传感器接收地面反射能量过程中的必要性, 从而为多光谱影像的形成和应用提供了支持.
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| 关 键 词： | 中分辨率大气辐射传输模型 光谱模拟 地面实测光谱 星上光谱 遥感 |
| 收稿时间： | 2015-03-11 |
Simulation to Channel on-Board Spectra of ASTER Based on MODTRAN |
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| Abstract: | Due to the location of sensor, the altitude intercept of ground and sensor can't be ignored. In addition, the atmospheric radiation energy contribution also can't be get rid of since the energy which the sensor gets is not all from the terrain reflection. That is the reason why ground measured data is smooth and continuous curve, while the on-board data is discrete line. The coupling calculation of radiative process and spectral response function is realized based on MODTRAN (moderate resolution atmosphere transmittance and radiance code) in this paper, starting from the ground measured spectral data of Monnogranite, quartz syenite, syenite and quartz diorite and the atmospheric and geometric conditions then completes the ASTER (advanced spaceborne theemal emission and reflection radiometer) channel on-board spectrum simulation process, and which establishes the contact of ground spectrum and on-board one, and proves the necessity of the coupling process of atmospheric impact and process of receiving the ground reflection energy of the sensor, which offers support for the formation of multispectral image. |
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