Google Earth Engine ——MYD09A1.006 Aqua Surface Reflectance 8-DayAqua MODIS 1-7带500米分辨率

The MYD09A1 V6 product provides an estimate of the surface spectral reflectance of Aqua MODIS bands 1-7 at 500m resolution and corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Along with the seven reflectance bands is a quality layer and four observation bands. For each pixel, a value is selected from all the acquisitions within the 8-day composite on the basis of high observation coverage, low view angle, the absence of clouds or cloud shadow, and aerosol loading.

Documentation:

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

MYD09A1 V6产品提供了Aqua MODIS 1-7带500米分辨率的表面光谱反射率的估计，并对大气条件如气体、气溶胶和瑞利散射进行了校正。与七个反射带一起的是一个质量层和四个观测带。对于每个像素，根据高观测覆盖率、低视角、无云或云影以及气溶胶负荷，从8天合成的所有采集中选择一个值。

Resolution

500 meters

Bands Table

• Bits 0-1: MODLAND QA bits
  • 0: Corrected product produced at ideal quality - all bands
  • 1: Corrected product produced at less than ideal quality - some or all bands
  • 2: Corrected product not produced due to cloud effects - all bands
  • 3: Corrected product not produced for other reasons - some or all bands, may be fill value (11) [Note that a value of (11) overrides a value of (01)]
• Bits 2-5: Band 1 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bits 6-9: Band 2 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bits 10-13: Band 3 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bits 14-17: Band 4 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bits 18-21: Band 5 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bits 22-25: Band 6 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bits 26-29: Band 7 data quality, four bit range
  • 0: Highest quality
  • 7: Noisy detector
  • 8: Dead detector, data interpolated in L1B
  • 9: Solar zenith ≥ 86 degrees
  • 10: Solar zenith ≥ 85 and < 86 degrees
  • 11: Missing input
  • 12: Internal constant used in place of climatological data for at least one atmospheric constant
  • 13: Correction out of bounds, pixel constrained to extreme allowable value
  • 14: L1B data faulty
  • 15: Not processed due to deep ocean or clouds
• Bit 30: Atmospheric correction performed
  • 0: No
  • 1: Yes
• Bit 31: Adjacency correction performed
  • 0: No
  • 1: Yes

SolarZenithMODIS Solar zenith angle018000Degrees0.01ViewZenithMODIS view zenith angle018000Degrees0.01RelativeAzimuthMODIS relative azimuth angle-1800018000Degrees0.01StateQASurface reflectance 500m state flags0StateQA Bitmask

• Bits 0-1: Cloud state
  • 0: Clear
  • 1: Cloudy
  • 2: Mixed
  • 3: Not set, assumed clear
• Bit 2: Cloud shadow
  • 0: No
  • 1: Yes
• Bits 3-5: Land/water flag
  • 0: Shallow ocean
  • 1: Land
  • 2: Ocean coastlines and lake shorelines
  • 3: Shallow inland water
  • 4: Ephemeral water
  • 5: Deep inland water
  • 6: Continental/moderate ocean
  • 7: Deep ocean
• Bits 6-7: Aerosol quantity
  • 0: Climatology
  • 1: Low
  • 2: Average
  • 3: High
• Bits 8-9: Cirrus detected
  • 0: None
  • 1: Small
  • 2: Average
  • 3: High
• Bit 10: Internal cloud algorithm flag
  • 0: No cloud
  • 1: Cloud
• Bit 11: Internal fire algorithm flag
  • 0: No fire
  • 1: Fire
• Bit 12: MOD35 snow/ice flag
  • 0: No
  • 1: Yes
• Bit 13: Pixel is adjacent to cloud
  • 0: No
  • 1: Yes
• Bit 14: BRDF correction performed data
  • 0: No
  • 1: Yes
• Bit 15: Internal snow mask
  • 0: No snow
  • 1: Snow

DayOfYearJulian day of the year for the pixel1366

使用说明：

Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.

数据引用：

LP DAAC - MYD09A1

代码：

var dataset = ee.ImageCollection('MODIS/006/MYD09A1')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var trueColor =
    dataset.select(['sur_refl_b01', 'sur_refl_b04', 'sur_refl_b03']);
var trueColorVis = {
  min: -100.0,
  max: 3000.0,
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(trueColor, trueColorVis, 'True Color');