Google Earth Engine ——MYD11A1 V6产品提供1200×1200公里网格内的每日陆地表面温度（LST）和发射率值数据集

The MYD11A1 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

MYD11A1 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。温度值来自MOD11_L2 扫频产品。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。

Dataset Availability

2002-07-04T00:00:00 - 2021-09-22T00:00:00

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Collection Snippet

ee.ImageCollection("MODIS/006/MYD11A1")

Resolution

1000 meters

Bands Table

• 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_timeLocal time of day observation0240Hours0.10Day_view_angleView zenith angle of day observation0130Degrees0-65LST_Night_1kmNighttime Land Surface Temperature750065535Kelvin0.020QC_NightNighttime LST Quality indicators00QC_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_timeLocal time of night observation0240Hours0.10Night_view_angleView zenith angle of night observation0130Degrees0-65Emis_31Band 31 emissivity12550.0020.49Emis_32Band 32 emissivity12550.0020.49Clear_day_covDay clear-sky coverage1655350.00050Clear_night_covNight clear-sky coverage1655350.00050

使用说明：

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

引用：

LP DAAC - MYD11A1

代码：

var dataset = ee.ImageCollection('MODIS/006/MYD11A1')
                  .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');