Google Earth Engine ——MCD43A4 V6天底双向反射分布函数调整反射率（NBAR）这个产品结合了Terra和Aqua航天器的数据，从16天的时间里选择最好的代表像素。

The MCD43A4 V6 Nadir Bidirectional Reflectance Distribution Function Adjusted Reflectance (NBAR) product provides 500 meter reflectance data of the MODIS "land" bands 1-7. These are adjusted using a bidirectional reflectance distribution function to model the values as if they were collected from a nadir view. The data are produced daily based on a 16-day retrieval period, with the image's date occurring on the 9th day. This product combines data from both the Terra and Aqua spacecrafts, choosing the best representative pixel from the 16-day period.

Documentation:

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

MCD43A4 V6天底双向反射分布函数调整反射率（NBAR）产品提供MODIS "陆地 "波段1-7的500米反射率数据。这些数据使用双向反射率分布函数进行调整，以模拟从天底视角收集的数值。这些数据是根据16天的检索期每天产生的，图像的日期发生在第9天。这个产品结合了Terra和Aqua航天器的数据，从16天的时间里选择最好的代表像素。

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/MCD43A4")

Resolution

500 meters

Bands Table

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

BRDF_Albedo_Band_Mandatory_Quality_Band2BRDF albedo mandatory quality for band 20BRDF_Albedo_Band_Mandatory_Quality_Band2 Bitmask

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

BRDF_Albedo_Band_Mandatory_Quality_Band3BRDF albedo mandatory quality for band 30BRDF_Albedo_Band_Mandatory_Quality_Band3 Bitmask

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

BRDF_Albedo_Band_Mandatory_Quality_Band4BRDF albedo mandatory quality for band 40BRDF_Albedo_Band_Mandatory_Quality_Band4 Bitmask

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

BRDF_Albedo_Band_Mandatory_Quality_Band5BRDF albedo mandatory quality for band 50BRDF_Albedo_Band_Mandatory_Quality_Band5 Bitmask

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

BRDF_Albedo_Band_Mandatory_Quality_Band6BRDF albedo mandatory quality for band 60BRDF_Albedo_Band_Mandatory_Quality_Band6 Bitmask

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

BRDF_Albedo_Band_Mandatory_Quality_Band7BRDF albedo mandatory quality for band 70BRDF_Albedo_Band_Mandatory_Quality_Band7 Bitmask

• Bit 0: Mandatory QA bit index
  • 0: Processed, good quality (full BRDF inversions)
  • 1: Processed, see other QA (magnitude BRDF inversions)

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/MCD43A4')
                  .filter(ee.Filter.date('2018-04-01', '2018-06-01'));
var trueColor = dataset.select([
  'Nadir_Reflectance_Band1', 'Nadir_Reflectance_Band4',
  'Nadir_Reflectance_Band3'
]);
var trueColorVis = {
  min: 0.0,
  max: 4000.0,
  gamma: 1.4,
};
Map.setCenter(-7.03125, 31.0529339857, 2);
Map.addLayer(trueColor, trueColorVis, 'True Color');