Google Earth Engine ——MYD11A1 V6産品提供1200×1200公裡網格内的每日陸地表面溫度（LST）和發射率值資料集

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産品提供1200×1200公裡網格内的每日陸地表面溫度（LST）和發射率值。溫度值來自MOD11_L2 掃頻産品。在緯度30度以上，一些像素可能有多個符合晴空标準的觀測。當這種情況發生時，像素值是所有符合條件的觀測值的平均值。與白天和夜間地表溫度帶及其品質名額層一起提供的還有MODIS 31和32帶以及六個觀測層。

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

Name	Description	Min	Max	Units	Scale	Offset
LST_Day_1km	Daytime Land Surface Temperature	7500	65535	Kelvin	0.02
QC_Day	Daytime LST Quality Indicators
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	240	Hours	0.1
Day_view_angle	View zenith angle of day observation	130	Degrees	-65
LST_Night_1km	Nighttime Land Surface Temperature	7500	65535	Kelvin	0.02
QC_Night	Nighttime LST Quality indicators
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	240	Hours	0.1
Night_view_angle	View zenith angle of night observation	130	Degrees	-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
Clear_night_cov	Night clear-sky coverage	1	65535	0.0005

使用說明：

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

引用：

 ​​LP DAAC - MYD11A1​​

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');