دورية أكاديمية
A Novel Inversion Approach for the Kernel-Driven BRDF Model for Heterogeneous Pixels
| العنوان: | A Novel Inversion Approach for the Kernel-Driven BRDF Model for Heterogeneous Pixels |
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| المؤلفون: | Hanliang Li, Kai Yan, Si Gao, Xuanlong Ma, Yelu Zeng, Wenjuan Li, Gaofei Yin, Xihan Mu, Guangjian Yan, Ranga B. Myneni |
| المصدر: | Journal of Remote Sensing, Vol 3 (2023) |
| بيانات النشر: | American Association for the Advancement of Science (AAAS), 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Environmental sciences LCC:Physical geography |
| مصطلحات موضوعية: | Environmental sciences, GE1-350, Physical geography, GB3-5030 |
| الوصف: | The bidirectional reflectance distribution function (BRDF) of the land surface contains information relating to its physical structure and composition. Accurate BRDF modeling for heterogeneous pixels is important for global ecosystem monitoring and radiation balance studies. However, the original kernel-driven models, which many operational BRDF/Albedo algorithms have adopted, do not explicitly consider the heterogeneity within heterogeneous pixels, which may result in large fitting residuals. In this paper, we attempted to improve the fitting ability of the kernel-driven models over heterogeneous pixels by changing the inversion approach and proposed a dynamic weighted least squares (DWLS) inversion approach. The performance of DWLS and the traditional ordinary least squares (OLS) inversion approach were compared using simulated data. We also evaluated its ability to reconstruct multiangle satellite observations and provide accurate BRDF using unmanned aerial vehicle observations. The results show that the developed DWLS approach improves the accuracy of modeled BRDF of heterogeneous pixels. The DWLS approach applied to satellite observations shows better performance than the OLS method in study regions and exhibits smaller mean fitting residuals both in the red and near-infrared bands. The DWLS approach also shows higher BRDF modeling accuracy than the OLS approach with unmanned aerial vehicle observations. These results indicate that the DWLS inversion approach can be a better choice when kernel-driven models are used for heterogeneous pixels. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2694-1589 |
| Relation: | https://doaj.org/toc/2694-1589 |
| DOI: | 10.34133/remotesensing.0038 |
| URL الوصول: | https://doaj.org/article/47a265c891af49c4a623c66625719aac |
| رقم الأكسشن: | edsdoj.47a265c891af49c4a623c66625719aac |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26941589 |
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| DOI: | 10.34133/remotesensing.0038 |