黑河流域地表过程综合观测网（四道桥超级站物候相机观测数据集-2023）

该数据集包含了2023年5月1日至2023年9月28日的黑河流域地表过程综合观测网下游四道桥超级站物候相机观测数据。站点位于内蒙古额济纳旗达来呼布镇四道桥，下垫面是柽柳。观测点的经纬度是101.1374E，42.0012N，海拔873m。对于物候期的计算，首先，根据感兴趣区计算物候指标，如相对绿度指数（GCC, Green Chromatic Coordinate公式为GCC=G/(R+G+B), R、G、B为图像红、绿、蓝三通道像元值）。然后对数据进行质量控制、无效值填充和滤波平滑。最后根据生长曲线拟合确定关键物候期参数，如生长季起始日、顶峰、生长季结束日等。本数据集为该站点2023年相对绿度指数（GCC）。
黑河流域地表过程综合观测网或站点信息请参考Liu et al. (2018)。

This dataset contains phenological camera observation data from the Sidaoqiao Super Station in the lower reaches of the Heihe River Basin Surface Process Comprehensive Observation Network, covering the period from May 1, 2023 to September 28, 2023. The station is located in Sidaoqiao, Dalaihubu Town, Ejin Banner, Inner Mongolia, with Tamarix as the underlying surface. The geographic coordinates of the observation site are 101.1374°E, 42.0012°N, and the elevation is 873 m. For phenological period calculation, first, phenological indicators are calculated based on regions of interest (ROIs), such as the Green Chromatic Coordinate (GCC). The formula for GCC is "GCC = G/(R+G+B)", where R, G, and B represent the pixel values of the red, green, and blue channels of the image, respectively. Subsequently, data quality control, invalid value imputation, and filter smoothing are performed on the dataset. Finally, key phenological period parameters, such as the start date of the growing season, peak value, and end date of the growing season, are determined via growth curve fitting. This dataset provides the 2023 Green Chromatic Coordinate (GCC) data from this station. For information on the Heihe River Basin Surface Process Comprehensive Observation Network or this station, please refer to Liu et al. (2018).