HJ1A与Landsat8卫星多光谱数据的交互对比

Cross comparison of HJ1A and Landsat8 Satellite Multispectral Data

为定量分析HJ与Landsat8卫星多光谱数据之间的可比性,基于河北和新疆HJ1A与Landsat8-OLI同步影像,对两种传感器之间的表观反射率一致性进行交互对比。结果显示,HJ1A-CCD与Landsat8-OLI数据之间有一定的可比性,发现在蓝、绿波段HJ1A信号强度小于Landsat8,而红、近红外波段HJ1A信号强度强于Landsat8。通过本文模型方程可以实现HJ1A向Landsat8-OLI的较好转换,各波段的精度表现依次为:绿波段>蓝波段>红波段>近红外波段。本文转换模型提高了HJ1A的数据质量,也提升了数据的应用价值。

Based on the synchronized images of HJ1A and Landsat8-OLI in Hebei and Xinjiang,the consistency of the apparent reflectance between the two sensors was interactively compared in order to quantitatively analyze the comparability between the multispectral data of HJ satellite and Landsat8 satellite.The results show that there is a certain degree of comparability between HJIACCD data and Landsat8-OLI data.It is found that the signal strength of HJIA in the blue and green bands is less than that of Landsat8,while the signal strength of HJIA in the red and near-infrared bands is stronger than that of Landsat8.The HJ1A data can be converted into Landsat8-OLI data through the model equations in this study.The accuracy of each band is as follows:green band>blue band>red band>near infrared band.Through this conversion model,the data quality of HJIA is improved,and the application value of the data is also enhanced.