中国区域500米NDVI侯合成产品（AQUA星）

产品介绍：MYDND1F即AQUA星中国500米 NDVI侯合成产品，是由MYDND1D计算得到，计算方法为取月内每五天的最大值。MYDND1D由MOD09GA经过拼接、切割、投影转换、单位换算等过程加工而成。命名规范如下：AAABBCD. EEEEEEEEE. CN.FFF.GG****，比如：中国每日温度合成命名为：MYDLT1D.20010101.CN.LTD.V1.TIF；AAA：卫星（MOD&MYD）；BB：参量（地表温度(LT)、NDV(ND)、EVI(EV)、SR（地表反射率））；C：分辨率（Q（250米）、H（500米）、1（1000米））；D：合成周期（D（每日）、F（5天合成），T（10天合成）、M（月合成）） l 注意：遇2月或大月，每月最后一个合成产品利用本月所有剩余天内的每日数据为输入。（比如平二月的5天合成产品实际数据输入为2月26、27、28三天）；CN：中国区域合成 EEEEEEE：年年年年天天天（2010001） 注意：合成产品以每个合成产品输入数据的第一天作为产品对应时间；FFF：参量 LTD：白天地表温度 LTN：夜间地表温度 QCD：白天质量评价文件 QCN：夜间质量评价文件；GG：版本号；****：文件类型（TIF、jpg、txt）。Product Introduction: MYDND1F, also known as the AQUA Star China 500-meter NDVI 5-day composite product, is derived from MYDND1D. The calculation method adopts maximum value compositing over each 5-day window within a month. MYDND1D is processed from MOD09GA through workflows including mosaicking, clipping, projection transformation, and unit conversion. The naming convention follows the format: AAABBCD. EEEEEEEEE. CN.FFF.GG****. For example, the daily composite product of China's surface temperature is named as: MYDLT1D.20010101.CN.LTD.V1.TIF. Detailed explanations of each naming segment are as follows: - AAA: Satellite identifier (MOD&MYD) - BB: Product parameter (LT for Land Surface Temperature, NDV for NDVI, EV for EVI, SR for Surface Reflectance) - C: Spatial resolution (Q = 250 meters, H = 500 meters, 1 = 1000 meters) - D: Composite period (D = Daily, F = 5-day composite, T = 10-day composite, M = Monthly composite) Note: For February or long months (months with 31 days), the final composite product of the month will use all remaining daily data of the current month as input. For instance, the 5-day composite product of a non-leap February will actually take daily data from February 26, 27, and 28 as its input source. - CN: China regional composite product - EEEEEEE: Timestamp in the format YYYYDDD (e.g., 2010001, representing the 1st day of the year 2010). Note: The corresponding time of each composite product is defined as the first day of the input dataset used for its generation. - FFF: Product parameter. LTD = Daytime Land Surface Temperature, LTN = Nighttime Land Surface Temperature, QCD = Daytime Quality Assessment File, QCN = Nighttime Quality Assessment File - GG: Version number - ****: File type (TIF, JPG, TXT)