Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.3390/rs11060632 |
| A Method for Landsat and Sentinel 2 (HLS) BRDF Normalization | |
| Franch, Belen1,2; Vermote, Eric2; Skakun, Sergii1,2; Roger, Jean-Claude1,2; Masek, Jeffrey2; Ju, Junchang2,3; Villaescusa-Nadal, Jose Luis1,2; Santamaria-Artigas, Andres1,2 | |
| 通讯作者 | Franch, Belen |
| 来源期刊 | REMOTE SENSING
 |
| EISSN | 2072-4292 |
| 出版年 | 2019 |
| 卷号 | 11期号:6 |
| 英文摘要 | The Harmonized Landsat/Sentinel-2 (HLS) project aims to generate a seamless surface reflectance product by combining observations from USGS/NASA Landsat-8 and ESA Sentinel-2 remote sensing satellites. These satellites' sampling characteristics provide nearly constant observation geometry and low illumination variation through the scene. However, the illumination variation throughout the year impacts the surface reflectance by producing higher values for low solar zenith angles and lower reflectance for large zenith angles. In this work, we present a model to derive the bidirectional reflectance distribution function (BRDF) normalization and apply it to the HLS product at 30 m spatial resolution. It is based on the BRDF parameters estimated from the MODerate Resolution Imaging Spectroradiometer (MODIS) surface reflectance product (M{O,Y}D09) at 1 km spatial resolution using the VJB method (Vermote et al., 2009). Unsupervised classification (segmentation) of HLS images is used to disaggregate the BRDF parameters to the HLS spatial resolution and to build a BRDF parameters database at HLS scale. We first test the proposed BRDF normalization for different solar zenith angles over two homogeneous sites, in particular one desert and one Peruvian Amazon forest. The proposed method reduces both the correlation with the solar zenith angle and the coefficient of variation (CV) of the reflectance time series in the red and near infrared bands to 4% in forest and keeps a low CV of 3% to 4% for the deserts. Additionally, we assess the impact of the view zenith angle (VZA) in an area of the Brazilian Amazon forest close to the equator, where impact of the angular variation is stronger because it occurs in the principal plane. The directional reflectance shows a strong dependency with the VZA. The current HLS BRDF correction reduces this dependency but still shows an under-correction, especially in the near infrared, while the proposed method shows no dependency with the view angles. We also evaluate the BRDF parameters using field surface albedo measurements as a reference over seven different sites of the US surface radiation budget observing network (SURFRAD) and five sites of the Australian OzFlux network. |
| 英文关键词 | HLS Landsat Sentinel 2 BRDF albedo SURFRAD OzFlux |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | USA |
| 开放获取类型 | gold, Green Submitted |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000465615300031 |
| WOS关键词 | SNOW-FREE ALBEDO ; SURFACE REFLECTANCE ; BIDIRECTIONAL REFLECTANCE ; TM/ETM PLUS ; RETRIEVAL ; MODIS ; FOREST |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/218350 |
| 作者单位 | 1.Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 3.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA |
| 推荐引用方式 GB/T 7714 | Franch, Belen,Vermote, Eric,Skakun, Sergii,et al. A Method for Landsat and Sentinel 2 (HLS) BRDF Normalization[J],2019,11(6). |
| APA | Franch, Belen.,Vermote, Eric.,Skakun, Sergii.,Roger, Jean-Claude.,Masek, Jeffrey.,...&Santamaria-Artigas, Andres.(2019).A Method for Landsat and Sentinel 2 (HLS) BRDF Normalization.REMOTE SENSING,11(6). |
| MLA | Franch, Belen,et al."A Method for Landsat and Sentinel 2 (HLS) BRDF Normalization".REMOTE SENSING 11.6(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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