Estimation of rice phenology date using integrated HJ-1 CCD and Landsat-8 OLI vegetation indices time-series images

被引:29
|
作者
Wang, Jing [1 ]
Huang, Jing-feng [1 ]
Wang, Xiu-zhen [2 ]
Jin, Meng-ting [2 ]
Zhou, Zhen [1 ]
Guo, Qiao-ying [1 ]
Zhao, Zhe-wen [1 ]
Huang, Wei-jiao [1 ]
Zhang, Yao [1 ]
Song, Xiao-dong [1 ]
机构
[1] Zhejiang Univ, Coll Environm & Resource Sci, Inst Remote Sensing & Informat Applicat, Hangzhou 310058, Zhejiang, Peoples R China
[2] Hangzhou Normal Univ, Inst Remote Sensing & Earth Sci, Hangzhou 311121, Zhejiang, Peoples R China
来源
关键词
Phenological parameters; Intercalibration; Vegetation index; HJ-1; CCD; Landsat-8; OLI; CROP PHENOLOGY; NDVI DATA; INTERCALIBRATION; PERFORMANCE; PATTERNS; AREA;
D O I
10.1631/jzus.B1500087
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Accurate estimation of rice phenology is of critical importance for agricultural practices and studies. However, the accuracy of phenological parameters extracted by remote sensing data cannot be guaranteed because of the influence of climate, e.g. the monsoon season, and limited available remote sensing data. In this study, we integrate the data of HJ-1 CCD and Landsat-8 operational land imager (OLI) by using the ordinary least-squares (OLS), and construct higher temporal resolution vegetation indices (VIs) time-series data to extract the phenological parameters of single-cropped rice. Two widely used VIs, namely the normalized difference vegetation index (NDVI) and 2-band enhanced vegetation index (EVI2), were adopted to minimize the influence of environmental factors and the intrinsic difference between the two sensors. Savitzky-Golay (S-G) filters were applied to construct continuous VI profiles per pixel. The results showed that, compared with NDVI, EVI2 was more stable and comparable between the two sensors. Compared with the observed phenological data of the single-cropped rice, the integrated VI time-series had a relatively low root mean square error (RMSE), and EVI2 showed higher accuracy compared with NDVI. We also demonstrate the application of phenology extraction of the single-cropped rice in a spatial scale in the study area. While the work is of general value, it can also be extrapolated to other regions where qualified remote sensing data are the bottleneck but where complementary data are occasionally available.
引用
收藏
页码:832 / 844
页数:13
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