Google Earth Engine ——MOD11A1/A2 V6产品提供1200×1200公里网格内的每日陆地表面温度（LST）和发射率值1KM分辨率数据集-CFANZ编程社区

The MOD11A1 V6 product provides daily land surface temperature (LST) and emissivity values in a 1200 x 1200 kilometer grid. The temperature value is derived from the MOD11_L2 swath product. Above 30 degrees latitude, some pixels may have multiple observations where the criteria for clear-sky are met. When this occurs, the pixel value is the average of all qualifying observations. Provided along with both the day-time and night-time surface temperature bands and their quality indicator layers are MODIS bands 31 and 32 and six observation layers.

Documentation:

User's Guide
Algorithm Theoretical Basis Document (ATBD)
General Documentation

MOD11A1 V6产品提供1200×1200公里网格内的每日陆地表面温度（LST）和发射率值。温度值是由MOD11_L2的扫描产品得出的。在纬度30度以上，一些像素可能有多个符合晴空标准的观测。当这种情况发生时，像素值是所有符合条件的观测值的平均值。与白天和夜间地表温度带及其质量指标层一起提供的还有MODIS 31和32带以及六个观测层。

The MOD11A2 V6 product provides an average 8-day land surface temperature (LST) in a 1200 x 1200 kilometer grid. Each pixel value in MOD11A2 is a simple average of all the corresponding MOD11A1 LST pixels collected within that 8 day period. The 8 day compositing period was chosen because twice that period is the exact ground track repeat period of the Terra and Aqua platforms. In this product, along with both the day- and night-time surface temperature bands and their quality indicator (QC) layers, are also MODIS bands 31 and 32 and eight observation layers.

MOD11A2 V6产品提供了一个1200 x 1200公里网格内的8天平均陆地表面温度（LST）。MOD11A2中的每个像素值是该8天内收集的所有相应的MOD11A1 LST像素的简单平均值。选择8天的合成期是因为这段时间的两倍正是Terra和Aqua平台的地面轨道重复期。在这个产品中，除了白天和夜间的地表温度带及其质量指标（QC）层之外，还有MODIS的31和32带以及八个观测层。Dataset Availability

2000-03-05T00:00:00 - 2021-09-20T00:00:00

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Collection Snippet

ee.ImageCollection("MODIS/006/MOD11A1")

Resolution

1000 meters

Bands Table

Name	Description	Min	Max	Units	Scale	Offset
LST_Day_1km	Daytime Land Surface Temperature	7500	65535	Kelvin	0.02	0
QC_Day	Daytime LST Quality Indicators				0	0
QC_Day Bitmask	Bits 0-1: Mandatory QA flags 0: LST produced, good quality, not necessary to examine more detailed QA 1: LST produced, other quality, recommend examination of more detailed QA 2: LST not produced due to cloud effects 3: LST not produced primarily due to reasons other than cloud Bits 2-3: Data quality flag 0: Good data quality 1: Other quality data 2: TBD 3: TBD Bits 4-5: Emissivity error flag 0: Average emissivity error ≤ 0.01 1: Average emissivity error ≤ 0.02 2: Average emissivity error ≤ 0.04 3: Average emissivity error > 0.04 Bits 6-7: LST error flag 0: Average LST error ≤ 1K 1: Average LST error ≤ 2K 2: Average LST error ≤ 3K 3: Average LST error > 3K
Day_view_time	Local time of day observation	0	240	Hours	0.1	0
Day_view_angle	View zenith angle of day observation	0	130	Degrees	0	-65
LST_Night_1km	Nighttime Land Surface Temperature	7500	65535	Kelvin	0.02	0
QC_Night	Nighttime LST Quality indicators				0	0
QC_Night Bitmask	Bits 0-1: Mandatory QA flags 0: LST produced, good quality, not necessary to examine more detailed QA 1: LST produced, other quality, recommend examination of more detailed QA 2: LST not produced due to cloud effects 3: LST not produced primarily due to reasons other than cloud Bits 2-3: Data quality flag 0: Good data quality 1: Other quality data 2: TBD 3: TBD Bits 4-5: Emissivity error flag 0: Average emissivity error ≤ 0.01 1: Average emissivity error ≤ 0.02 2: Average emissivity error ≤ 0.04 3: Average emissivity error > 0.04 Bits 6-7: LST error flag 0: Average LST error ≤ 1K 1: Average LST error ≤ 2K 2: Average LST error ≤ 3K 3: Average LST error > 3K
Night_view_time	Local time of night observation	0	240	Hours	0.1	0
Night_view_angle	View zenith angle of night observation	0	130	Degrees	0	-65
Emis_31	Band 31 emissivity	1	255		0.002	0.49
Emis_32	Band 32 emissivity	1	255		0.002	0.49
Clear_day_cov	Day clear-sky coverage	1	65535		0.0005	0
Clear_night_cov	Night clear-sky coverage	1	65535		0.0005	0

使用说明：MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

数据引用：LP DAAC - MOD11A1 Google Earth Engine ——MOD11A1/A2 V6产品提供1200×1200公里网格内的每日陆地表面温度（LST）和发射率值1KM分辨率数据集_sql https://doi.org/10.5067/MODIS/MOD11A1.006

代码：

var dataset = ee.ImageCollection('MODIS/006/MOD11A1')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var landSurfaceTemperature = dataset.select('LST_Day_1km');
var landSurfaceTemperatureVis = {
  min: 13000.0,
  max: 16500.0,
  palette: [
    '040274', '040281', '0502a3', '0502b8', '0502ce', '0502e6',
    '0602ff', '235cb1', '307ef3', '269db1', '30c8e2', '32d3ef',
    '3be285', '3ff38f', '86e26f', '3ae237', 'b5e22e', 'd6e21f',
    'fff705', 'ffd611', 'ffb613', 'ff8b13', 'ff6e08', 'ff500d',
    'ff0000', 'de0101', 'c21301', 'a71001', '911003'
  ],
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(
    landSurfaceTemperature, landSurfaceTemperatureVis,
    'Land Surface Temperature');