山区复杂地形条件下GF-1卫星遥感雪面反射率计算

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (5): 944–954.

山区复杂地形条件下GF-1卫星遥感雪面反射率计算

蒋璐媛1,2,3，肖鹏峰1,2,3*，冯学智1,2,3，耶楠1,2,3，贺广均1,2,3,4，张学良1,2,3

出版日期:2015-09-09 发布日期:2015-09-09
作者简介:(1.江苏省地理信息技术重点实验室,南京大学,南京,210023; 2. 卫星测绘技术与应用国家测绘地理信息局重点实验室,南京大学,南京,210023; 3. 南京大学地理信息科学系,南京,210023;4天地一体化信息技术国家重点实验室,航天恒星科技有限公司,北京,100086)
基金资助:
高分辨率对地观测系统国家科技重大专项项目（95-Y40B02-9001-13/15-04），国家自然科学基金项目（41271353）

Calculation of snow reflectance from GF-1 satellite imagein rugged mountain areas

Ye Nan1,2,3, He Guangjun1,2,3,4, Zhang Xueliang1,2,3

Online:2015-09-09 Published:2015-09-09
About author:(1. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University;
2. Key Laboratory for Satellite Mapping Technology and Applications of State Administration of Surveying, Mapping and Geoinformation of China, Nanjing University;
3. Department of Geographic Information Science, Nanjing University;
4.State Key Laboratory of Space-Ground Integrated Information Technology,Company Limited,Beijing)

摘要/Abstract

摘要： 针对山区遥感影像计算雪面反射率的难点.采用各向异性校正与地形校正相结合的方法.将研究区不同坡面方向的雪面反射率归一化至平坦地表垂直观测方向上的雪面反射率.以消除地形影响其中.各向异性校正采用二向反射分布函数(Bidirectional Rellectance Distribution Function, BRDF)模型;地形校正采用山地辐射传输模型遥感影像选用新疆玛纳斯河流域的高分一号卫星(GF-1)宽幅相机数据利用同步观测的积雪光谱数据对此方法的校正能力进行验证.结果表明此方法能够消除大部分地形和大气的影响;计算的雪面反射率在非阴影区与阴影区
均与实测数据相一致;该方法可为山区积雪的光学遥感研究提供技术支撑

Abstract: Aiming at the difficulty in calculating snow reflectance from high spatial resolution image in mountain areas, in this paper, a method combined with anisotropy correction and topographic correction was proposed to covert the snow reflectance in different slope to the nadir direction on the flat surface. In the process of anisotropy correction and topographic correction, BRDF model and mountain radiation transmission model are applied to eliminate topographic effects respectively. The GF-1 WFV image of Manasi River Basin, Xinjiang Province was chosen as research data and snow spectral data achieved by synchronous observation was employed to evaluate the this method. The results show that this method could generally eliminate the influence caused by rugged terrain and atmosphere; the snow reflectance calculated by this method is in agreement with field observations in both non-shadow area and shadow area; this method can supportthe research on optical remote sensing of snow in mountain areas

蒋璐媛1,2,3，肖鹏峰1,2,3*，冯学智1,2,3，耶楠1,2,3，贺广均1,2,3,4，张学良1,2,3. 山区复杂地形条件下GF-1卫星遥感雪面反射率计算[J]. 南京大学学报(自然科学版), 2015, 51(5): 944–954.

Ye Nan1,2,3, He Guangjun1,2,3,4, Zhang Xueliang1,2,3. Calculation of snow reflectance from GF-1 satellite imagein rugged mountain areas[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(5): 944–954.

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