Google Earth Engine ——MCD43A2 V6双向反射分布函数和反照率（BRDF/Albedo）质量500m数据集是一个500米的每日16天产品。包含质量信息！

The MCD43A2 V6 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) Quality dataset is a 500 meter daily 16-day product. It contains all the quality information for the corresponding 16-day MCD43A3 Albedo and the MCD43A4 Nadir-BRDF (NBAR) products.

The MCD43A2 contains individual band quality and observation information for the MODIS land bands 1-7, along with the overall BRDF/Albedo quality information.

See dataset user guide for more information.

Documentation:

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

MCD43A2 V6双向反射分布函数和反照率（BRDF/Albedo）质量数据集是一个500米的每日16天产品。它包含了相应的16天MCD43A3反照率和MCD43A4 Nadir-BRDF（NBAR）产品的所有质量信息。

MCD43A2包含MODIS陆地波段1-7的单个波段质量和观测信息，以及整体BRDF/反照率质量信息。

更多信息见数据集用户指南。

文件。

用户指南

算法理论基础文件(ATBD)

一般文件

Dataset Availability

2000-02-18T00:00:00 - 2021-09-12T00:00:00

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Collection Snippet

ee.ImageCollection("MODIS/006/MCD43A2")

Resolution

500 meters

Bands Table

• Bit 0: Mandatory QA
  • 0: Snow-free albedo retrieved
  • 1: Snow albedo retrieved

BRDF_Albedo_PlatformBRDF albedo platform information0BRDF_Albedo_Platform Bitmask

• Bits 0-1: Platform
  • 0: Terra
  • 1: Terra/Aqua
  • 2: Aqua

BRDF_Albedo_LandWaterTypeLand/water type0BRDF_Albedo_LandWaterType Bitmask

• Bits 0-2: Land/water type
  • 0: Shallow ocean
  • 1: Land (nothing else but land)
  • 2: Ocean coastlines and lake shorelines
  • 3: Shallow inland water
  • 4: Ephemeral water
  • 5: Deep inland water
  • 6: Moderate or continental ocean
  • 7: Deep ocean

BRDF_Albedo_LocalSolarNoonSolar zenith angle of local solar noon0254Degrees0BRDF_Albedo_ValidObs_Band1Valid observation for band 10BRDF_Albedo_ValidObs_Band1 Bitmask

• Bit 0: Day 1 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 1: Day 2 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 2: Day 3 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 3: Day 4 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 4: Day 5 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 5: Day 6 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 6: Day 7 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 7: Day 8 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 8: Day 9 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 9: Day 10 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 10: Day 11 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 11: Day 12 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 12: Day 13 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 13: Day 14 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 14: Day 15 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation
• Bit 15: Day 16 reflectance quality
  • 0: Observation not used
  • 1: Valid clear observation

BRDF_Albedo_ValidObs_Band2Valid observation for band 2 (same bit meaning as in band 1)0BRDF_Albedo_ValidObs_Band3Valid observation for band 3 (same bit meaning as in band 1)0BRDF_Albedo_ValidObs_Band4Valid observation for band 4 (same bit meaning as in band 1)0BRDF_Albedo_ValidObs_Band5Valid observation for band 5 (same bit meaning as in band 1)0BRDF_Albedo_ValidObs_Band6Valid observation for band 6 (same bit meaning as in band 1)0BRDF_Albedo_ValidObs_Band7Valid observation for band 7 (same bit meaning as in band 1)0BRDF_Albedo_Band_Quality_Band1BRDF inversion information for band 10BRDF_Albedo_Band_Quality_Band1 Bitmask

• Bits 0-2: BRDF inversion information for band 1
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 & < 7)
  • 4: Fill value

BRDF_Albedo_Band_Quality_Band2BRDF inversion information for band 20BRDF_Albedo_Band_Quality_Band2 Bitmask

• Bits 0-2: BRDF inversion information for band 2
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 & < 7)
  • 4: Fill value

BRDF_Albedo_Band_Quality_Band3BRDF inversion information for band 30BRDF_Albedo_Band_Quality_Band3 Bitmask

• Bits 0-2: BRDF inversion information for band 3
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 & < 7)
  • 4: Fill value

BRDF_Albedo_Band_Quality_Band4BRDF inversion information for band 40BRDF_Albedo_Band_Quality_Band4 Bitmask

• Bits 0-2: BRDF inversion information for band 4
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 & < 7)
  • 4: Fill value

BRDF_Albedo_Band_Quality_Band5BRDF inversion information for band 50BRDF_Albedo_Band_Quality_Band5 Bitmask

• Bits 0-2: BRDF inversion information for band 5
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 & < 7)
  • 4: Fill value

BRDF_Albedo_Band_Quality_Band6BRDF inversion information for band 60BRDF_Albedo_Band_Quality_Band6 Bitmask

• Bits 0-2: BRDF inversion information for band 6
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 & < 7)
  • 4: Fill value

BRDF_Albedo_Band_Quality_Band7BRDF inversion information for band 70BRDF_Albedo_Band_Quality_Band7 Bitmask

• Bits 0-2: BRDF inversion information for band 7
  • 0: Best quality, full inversion (WoDs and RMSE are good)
  • 1: Good quality, full inversion (also including the cases with no clear sky observations over the day of interest and those with a Solar Zenith Angle that is > 70 degrees even though WoDs and RMSE majority are good)
  • 2: Magnitude inversion (numobs ≥ 7)
  • 3: Magnitude inversion (numobs ≥ 2 and < 7)
  • 4: Fill value

BRDF_Albedo_UncertaintyBRDF inversion information0327660.001

使用说明：

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

通过LP DAAC获得的MODIS数据和产品对后续使用、销售或再分配没有限制。

引用：

LP DAAC - MCD12Q1LP DAAC - Land Processes Distributed Active Archive Center - Sioux Falls, SD

https://doi.org/10.5067/MODIS/MCD12Q1.006

代码：

var dataset = ee.ImageCollection('MODIS/006/MCD43A2')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var defaultVisualization = dataset.select('Snow_BRDF_Albedo');
var defaultVisualizationVis = {
  min: 0.0,
  max: 1.0,
};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(
    defaultVisualization, defaultVisualizationVis, 'Default visualization');