基于GF-1/2卫星数据的冬小麦叶面积指数反演

吾木提·艾山江,买买提·沙吾提,陈水森,李丹

Inversion of leaf area index of winter wheat based on GF-1/2 image

HASAN Umut,SAWUT Mamat,Shui-Sen CHEN,Dan LI

表4 基于GF-1/2影像宽波段植被指数的LAI单变量估算模型

Table 4 LAI univariate estimation model based on GF-1/2 broad band vegetation indices

生育期 Growth stage	宽波段VI Wide band VI	模型方程 Model equation	R²	RMSE
GF-1起身期 GF-1 Erecting stage	MSR	y = 5.4668x-2.6287	0.701	0.494
		y = 2.9635x^2.6672	0.722	0.477
		y = 0.1309e^3.1277^x	0.716	0.481
		y = 6.6008x²-5.0771x+1.4542	0.724	0.475
GF-2起身期 GF-2 Erecting stage	NDVI	y = 12.4782x-2.5336	0.765	0.437
		y = 17.8705x^2.2060	0.745	0.455
		y = 0.2349e^5.6859^x	0.722	0.477
		y = -11.7369x²+21.1498x-4.0829	0.768	0.435
GF-1拔节期 GF-1 Jointing stage	GNDVI	y = 8.7911x+0.4153	0.761	0.553
		y = 9.1945x^0.9409	0.759	0.555
		y = 2.2386e^1.5225^x	0.774	0.537
		y = 17.5354x²-13.1548x+7.0072	0.783	0.527
GF-1开花期 GF-1 Flowering stage	EVI	y = 3.1677x+0.6820	0.766	0.379
		y = 3.7582x^0.9018	0.767	0.378
		y = 2.8333e^0.4510^x	0.766	0.379
		y = -0.1721x²+3.8568x+0.0010	0.766	0.379