Cross Validation of FY3D MWRI Passive Microwave LST With MODIS LST Under Clear-Sky Conditions

IF 4.7 2区地球科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Pub Date : 2025-04-11 DOI:10.1109/JSTARS.2025.3560132

Yuting Gong;Huifang Li;Xiuqing Hu;Huanfeng Shen

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引用次数: 0

Abstract

Passive microwave (PMW) land surface temperature (LST) is widely used in climatology, agriculture, and environmental science due to its large range, all-weather capabilities, and other unique advantages. FY3D microwave radiation imager (MWRI) offers some of the global rare PMW LST products, but the accuracy is not clear due to the lack of research on the validation of the FY3D MWRI LST products. Therefore, cross validation of FY3D MWRI LST with moderate-resolution imaging spectroradiometer LST was investigated in this study. Based on the quality control, temporal matching, and spatial matching, the spatial and temporal distribution were validated between the two LST products from 2019 to 2023. In the spatial cross validation, the overall correlation coefficient (R) of the two daily LST products distributed between 0.68 and 0.84, and the deviation ranged from 3 to 8 K. The R of the two LST monthly products was between 0.78 and 0.89, with the deviation mainly distributed between 3 and 6 K. This suggests that the monthly product is more stable and has a more reliable accuracy than the daily FY3D MWRI LST product. In the temporal cross validation, the seven dominant global land cover types were analyzed. It can be found that the main distribution of R was in the range of 0.7–0.9, and the deviation was mainly 3–6 K. With the improvement of the FY3D MWRI LST official retrieval algorithm, the accuracy of the FY3D MWRI LST products has improved significantly, and the products deserve extensive attention.

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晴空条件下FY3D MWRI无源微波地表温度与MODIS地表温度的交叉验证

被动微波（PMW）地表温度（LST）以其测量范围大、全天候等独特优势在气候学、农业和环境科学等领域得到广泛应用。FY3D微波辐射成像仪（MWRI）提供了一些全球罕见的PMW LST产品，但由于缺乏对FY3D MWRI LST产品验证的研究，其精度尚不明确。因此，本研究将FY3D MWRI LST与中分辨率成像光谱辐射计LST进行交叉验证。在质量控制、时间匹配和空间匹配的基础上，验证了2019 - 2023年两个LST产品的时空分布。在空间交叉验证中，两种日LST产品的总体相关系数(R)分布在0.68 ~ 0.84之间，偏差在3 ~ 8 K之间。两个月产品的R值在0.78 ~ 0.89之间，偏差主要分布在3 ~ 6k之间。这说明月度产品比每日FY3D MWRI LST产品更稳定，精度更可靠。在时间交叉验证中，分析了7种主要的全球土地覆盖类型。可以发现，R的主要分布在0.7-0.9范围内，偏差主要为3-6 K。随着FY3D MWRI LST官方检索算法的改进，FY3D MWRI LST产品的精度有了明显提高，值得广泛关注。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 地学-成像科学与照相技术

CiteScore

9.30

自引率

10.90%

发文量

563

审稿时长

4.7 months

期刊介绍： The IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing addresses the growing field of applications in Earth observations and remote sensing, and also provides a venue for the rapidly expanding special issues that are being sponsored by the IEEE Geosciences and Remote Sensing Society. The journal draws upon the experience of the highly successful “IEEE Transactions on Geoscience and Remote Sensing” and provide a complementary medium for the wide range of topics in applied earth observations. The ‘Applications’ areas encompasses the societal benefit areas of the Global Earth Observations Systems of Systems (GEOSS) program. Through deliberations over two years, ministers from 50 countries agreed to identify nine areas where Earth observation could positively impact the quality of life and health of their respective countries. Some of these are areas not traditionally addressed in the IEEE context. These include biodiversity, health and climate. Yet it is the skill sets of IEEE members, in areas such as observations, communications, computers, signal processing, standards and ocean engineering, that form the technical underpinnings of GEOSS. Thus, the Journal attracts a broad range of interests that serves both present members in new ways and expands the IEEE visibility into new areas.