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。

简介: 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:


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

Name Description Min Max Wavelength Scale
Nadir_Reflectance_Band1 NBAR at local solar noon for band 1 0 32766 620-670nm 0.0001
Nadir_Reflectance_Band2 NBAR at local solar noon for band 2 0 32766 841-876nm 0.0001
Nadir_Reflectance_Band3 NBAR at local solar noon for band 3 0 32766 459-479nm 0.0001
Nadir_Reflectance_Band4 NBAR at local solar noon for band 4 0 32766 545-565nm 0.0001
Nadir_Reflectance_Band5 NBAR at local solar noon for band 5 0 32766 1230-1250nm 0.0001
Nadir_Reflectance_Band6 NBAR at local solar noon for band 6 0 32766 1628-1652nm 0.0001
Nadir_Reflectance_Band7 NBAR at local solar noon for band 7 0 32766 2105-2155nm 0.0001
BRDF_Albedo_Band_Mandatory_Quality_Band1 BRDF albedo mandatory quality for band 1 0
BRDF_Albedo_Band_Mandatory_Quality_Band1 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_Band2 BRDF albedo mandatory quality for band 2 0
BRDF_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_Band3 BRDF albedo mandatory quality for band 3 0
BRDF_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_Band4 BRDF albedo mandatory quality for band 4 0
BRDF_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_Band5 BRDF albedo mandatory quality for band 5 0
BRDF_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_Band6 BRDF albedo mandatory quality for band 6 0
BRDF_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_Band7 BRDF albedo mandatory quality for band 7 0
BRDF_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:


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');



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