中国区域1KM地表温度侯合成产品（TERRA星）

产品介绍：中国1KM地表温度侯合成产品（TERRA星）是由MODLT1D产品经过合成计算得到，计算方法为取侯平均值。MODLT1D即中国1KM地表温度（Day&Night）每天产品是由MOD11A1经过拼接、切割、投影转换等过程加工而成。每天数据中包括白天地表温度、夜间地表温度、白天地表反射率、夜间地表反射率四类产品；其中数据比例因子为0.02，单位为开尔文。根据使用需求，可通过计算公式：0.02*value-273.15转换为摄氏温度。 命名规范如下： AAABBCD. EEEEEEEEE. CN.FFF.GG**** 比如：中国每日温度合成命名为：MODLT1D.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: The 1KM land surface temperature 10-day composite product (TERRA satellite) is derived from the MODLT1D product via compositing calculations, using the 10-day average value as the calculation result. The MODLT1D product, which refers to the daily 1KM land surface temperature (Day & Night) product for China, is processed from MOD11A1 through standard remote sensing procedures including mosaicking, clipping, and projection transformation.

The daily dataset includes four types of products: daytime land surface temperature, nighttime land surface temperature, daytime surface reflectance, and nighttime surface reflectance. The data scale factor is 0.02, with the unit of Kelvin. For practical applications, the raw data value can be converted to Celsius temperature using the formula: 0.02*value - 273.15.

### Naming Convention
The official naming rule is as follows: AAABBCD.EEEEEEEEEE.CN.FFF.GG****
For example, the daily temperature composite product for China is named as MODLT1D.20010101.CN.LTD.V1.TIF.

Detailed explanations of each field:
- AAA: Satellite identifier (MOD & MYD)
- BB: Parameter type (Land Surface Temperature (LT), NDV (ND), EVI (EV), SR (Surface Reflectance))
- C: Spatial resolution (Q (250 m), H (500 m), 1 (1000 m))
- 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 last 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 year February will actually use daily data from February 26, 27, and 28 as input.

- CN: Indicates the composite product is for the Chinese territory
- EEEEEEE: Timestamp in the format of Year + Day of Year (e.g., 2010001, where 2010 is the year and 001 is the 1st day of the year)
- Note: The corresponding time of the composite product is determined by the first day of the daily data used as input for that composite product
- 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 extension (TIF, JPG, TXT)

搜集汇总

背景与挑战

背景概述

该数据集是中国区域1KM地表温度侯合成产品，基于TERRA卫星的MODIS数据，通过合成计算得到侯平均地表温度，覆盖白天地表温度、夜间地表温度及相关反射率产品，空间分辨率为1公里，数据格式为GeoTiff，总存储容量为326 GB。数据集由中国科学院计算机网络信息中心于2022年发布，适用于地表温度监测和环境研究，提供开尔文单位数据并可转换为摄氏温度，命名规范详细，便于数据识别和使用。