中国区域500米NDVI月合成产品(AQUA星)

产品介绍：MYDND1M即AQUA星中国500米 NDVI月合成产品，是由MYDND1D计算得到，计算方法为取月内的最大值。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）。(协议共享)

Product Introduction: MYDND1M, namely the AQUA Satellite China 500m NDVI monthly composite product, is derived from MYDND1D, which adopts the maximum value composite (MVC) method over the target month. MYDND1D is generated from MOD09GA via a series of preprocessing steps including mosaicking, clipping, projection transformation, and unit conversion.

The naming convention is as follows: AAABBCD.EEEEEEEEEE.CN.FFF.GG****. For example, the daily temperature composite product for China is named: MYDLT1D.20010101.CN.LTD.V1.TIF.
Breakdown of each naming segment:
- AAA: Satellite sensor (MOD&MYD)
- BB: Parameter (Land Surface Temperature (LT), NDVI (NDV), EVI (EV), SR (Surface Reflectance))
- C: Spatial resolution (Q (250m), H (500m), 1 (1000m))
- D: Composite period (D (Daily), F (5-day composite), T (10-day composite), M (Monthly composite))

Note: For February or long months, the final composite product of the month will use all remaining daily data within the current month as input. For example, the 5-day composite product for a non-leap February actually uses data from February 26, 27 and 28 as input.
- CN: China regional composite product
- EEEEEEEEEE: Year-year-year-year-day-day-day (format example: 2010001, representing the 1st day of the year 2010). Note: Each composite product uses the first day of the daily input data used for its generation as its corresponding temporal timestamp.
- FFF: Parameter code. 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). (Shared under relevant protocols)