| 摘要: |
| 为建立准确、方便的叶面积指数监测方法，运用MODIS数据光学模型反演和星陆双基协同反演法分别对2015和2016年3月中旬鹤壁市冬小麦叶面积指数反演分析。结果表明，2种LAI反演方法均能较好地反映全市冬小麦长势差异性的空间分布特征；MODIS光学模型反演法稳定性较好，但其反演值明显偏低；星陆双基协同反演法估算值与观测值吻合性较好，反演精度优于MODIS反演法。 |
| 关键词: 星陆双基； MODIS； 叶面积指数； 反演 |
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| Calculating the Leaf Area Index of Winter Wheat Using the “Double Bases of Satellite to Land” Method |
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WEI Qingwei, ZHANG Hongwei, REN Liwei
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CMA/Henan Key Laboratory of Agro-meteorological Safeguard and Applied Technique, Zhengzhou 450003, China; Henan Meteorological Administration, Zhengzhou 450003, China; Hebi Meteorological Bureau, Hebi 458030, China
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| Abstract: |
| Monitoring leaf index of winter wheat using remote sensing was an efficient method to quickly and accurately acquire the growth and spatial distribution of winter wheat at large scales. In this paper we compared the leaf area index (LAI) of winter wheat in March of 2015 and 2016 in Hebi of Henan Province using the “Double Bases of Satellite to Land” method and MODIS. The results showed that the LAIs calculated using the two methods could represent the spatial distribution of winter wheat in this region well. The stability of the MODIS is superior, but the LAI calculated by it is systematically lower than the on-site measurements. In contrast, the results calculated using the “Double Bases of Satellite to Land” agree well with the measurements. |
| Key words: double bases of satellite to land; MODIS; leaf area index |
