Season maximum value 2017-present (raster 10m and 100m), Europe, yearly, Nov. 2022 - adjusted to the HRL grid

The Season Maximum Value (MAXV), one of the Vegetation Phenology and Productivity (VPP) parameters, is a product of the pan-European High Resolution Vegetation Phenology and Productivity (HR-VPP) component of the Copernicus Land Monitoring Service (CLMS). The Season Maximum Value (MAXV) provides the maximum (peak) value that the Plant Phenology Index (PPI) reaches during the vegetation growing season. The Plant Phenology Index (PPI) is a physically based vegetation index, developed for improving the monitoring of the vegetation growth cycle. The PPI index values, with 5-day satellite revisit cycle, are first used in a function fitting to derive the PPI Seasonal Trajectories, which is a filtered time series with regular 10-day time step. From these Seasonal Trajectories, a suite of 13 Vegetation Phenology and Productivity (VPP) parameters are then computed and provided, for up to two seasons each year. The Season Maximum Value is one of the 13 parameters. The full list is available in the table 3 of the Product User Manual in the below link section. A complementary quality indicator (QFLAG) provides a confidence level, that is described in table 4 of the same manual. The MAXV dataset is made available as raster files with 10 x 10m resolutionand 100 x 100m resolutions, in ETRS89-LAEA projection corresponding to the HRL grid, for those tiles that cover the EEA38 countries and the United Kingdom and for two seasons in each year from 2017 onwards. It is updated in the first quarter of each year.

季节最大值（Season Maximum Value, MAXV）作为植被物候与生产力（Vegetation Phenology and Productivity, VPP）参数之一，是哥白尼陆地监测服务（Copernicus Land Monitoring Service, CLMS）旗下泛欧洲高分辨率植被物候与生产力（pan-European High Resolution Vegetation Phenology and Productivity, HR-VPP）模块的产品。季节最大值（MAXV）表征了植物物候指数（Plant Phenology Index, PPI）在植被生长季内所能达到的极值（峰值）。植物物候指数（PPI）是一种基于物理机制的植被指数，旨在优化植被生长周期的监测工作。该指数采用5天的卫星重访周期获取观测值，首先通过函数拟合处理得到PPI季节轨迹——这是一种经过滤波处理的规则化时间序列，时间步长为10天。基于上述PPI季节轨迹，可计算并生成一套共计13项VPP参数，每年最多覆盖两个生长季，而季节最大值正是这13项参数之一。完整参数列表可参见下文链接板块中产品用户手册的表3。配套质量指示标志（Quality Indicator, QFLAG）可提供数据置信度水平，相关说明详见该手册的表4。MAXV数据集以栅格文件形式发布，分辨率包含10×10米与100×100米两种，采用与高分辨率网格（HRL grid）匹配的ETRS89-LAEA投影坐标系，覆盖欧洲经济区38国（EEA38 countries）与英国的对应瓦片，自2017年起每年提供两个生长季的数据，且于每年第一季度更新。