Google Earth Engine ——MCD43C3第6版双向反射分布函数和反照率（BRDF/Albedo）反照率数据集是在0.05度（赤道5,600米）的气候模拟网格（CMG）中使用16天数据

The MCD43C3 Version 6 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) Albedo dataset is produced daily using 16 days of Terra and Aqua MODIS data in a 0.05 degree (5,600 meters at the equator) Climate Modeling Grid (CMG). Data are temporally weighted to the ninth day of the retrieval period which is reflected in the Julian date in the file name. This CMG product covers the entire globe for use in climate simulation models. MCD43C3 provides black-sky albedo (directional hemispherical reflectance) and white-sky albedo (bihemispherical reflectance) at local solar noon. Black-sky albedo and white-sky albedo values are available as a separate layer for MODIS spectral bands 1 through 7 as well as the visible, near infrared (NIR), and shortwave bands. Along with the 20 albedo layers are ancillary layers for quality, local solar noon, percent finer resolution inputs, snow cover, and uncertainty. See dataset user guide for more information.

MCD43C3第6版双向反射分布函数和反照率（BRDF/Albedo）反照率数据集是在0.05度（赤道5,600米）的气候模拟网格（CMG）中使用16天的Terra和Aqua MODIS数据每天生成。数据在时间上加权到检索期的第9天，这反映在文件名中的朱利安日期。这个CMG产品覆盖整个地球，用于气候模拟模型。MCD43C3提供当地太阳正午的黑天反照率（定向半球形反射率）和白天反照率（双球形反射率）。黑天反照率和白天反照率值可作为MODIS光谱带1至7以及可见光、近红外（NIR）和短波带的独立层。与20个反照率层一起，还有质量、当地太阳正午、更精细的输入百分比、雪覆盖和不确定性的辅助层。更多信息见数据集用户指南。

Dataset Availability

2000-02-24T00:00:00 - 2021-09-09T00:00:00

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Collection Snippet

ee.ImageCollection("MODIS/006/MCD43C3")

Resolution

5600 meters

Bands Table

• Bits 0-2: BRDF and albedo quality information
  • 0: best quality, 100% with full inversions
  • 1: good quality, 75% or more with best full inversions and 90% or more with full inversions
  • 2: relative good quality, 75% or more with full inversions
  • 3: mixed, 75% or less full inversions and 25% or less fill values
  • 4: all magnitude inversions or 50% or less fill values
  • 5: all magnitude inversions or 50% or less fill values

Local_Solar_NoonLocal solar noon zenith angle090degrees0Percent_InputsPercent of the processed finer resolution data which contributed to this CMG pixel0100%0Percent_SnowPercent of underlying data flagged as snow0100%0BRDF_Albedo_UncertaintyBRDF inversion information. Weights of determination (WoD) of the white sky albedo (see Lucht, W., & Lewis, P. (2000). Theoretical noise sensitivity of BRDF and albedo retrieval from the EOS-MODIS and MISR sensors with respect to angular sampling. International Journal of Remote Sensing, 21(1), 81–98). WoDs give a measure of the uncertainty due to the angular sampling of the inputs available for each retrieval.032766

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/MCD43C3')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var blackSkyAlbedo = dataset.select('Albedo_BSA_Band1');
var blackSkyAlbedoVis = {
  min: 0.0,
  max: 400.0,
};
Map.setCenter(6.746, 46.529, 6);
Map.addLayer(blackSkyAlbedo, blackSkyAlbedoVis, 'Black-Sky Albedo');