MCD19A1CMGL v061

MODIS/Terra+Aqua Surface Reflectance (Bands 1-7) from MAIAC, Daily L3 Global 0.05 Deg CMG


PI: Alexei Lyapustin

The MAIAC data products have been released with the caveat that the reprocessing for the full mission is expected to continue through spring 2023.

Description

The MCD19A1CMGL Version 6.1 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-Angle Implementation of Atmospheric Correction (MAIAC) Surface Reflectance Level 3 (Bands 1-7) product produced daily in a 0.05 degree (5,600 meters at the equator) Climate Modeling Grid (CMG). The MCD19A1CMGL product is corrected for atmospheric gases and aerosols using a new MAIAC algorithm that is based on a time series analysis and a combination of pixel- and image-based processing. The MODIS MAIAC products provide an estimate of the surface spectral reflectance, also referred to as Bidirectional Reflectance Factor (BRF), as it would be measured at ground-level in the absence of atmospheric scattering or absorption. The Surface Reflectance dataset includes BRF, BRF normalized to a fixed geometry of solar zenith angle at 45° and nadir view, and Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) normalized to the nadir view and local sun angle at 1:30 pm.

The MCD19A1CMGL MAIAC Surface Reflectance product for land bands includes 25 Science Dataset (SDS) layers: BRF for bands 1-7, BRF normalized to a fixed geometry for bands 1-7, NBAR for bands 1-7, Quality Assessment (QA) bits, cosine of solar zenith angle, cosine of view zenith angle, and relative azimuth angle. A low-resolution browse is also included.

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Characteristics

Improvements/Changes from Previous Versions

No previous versions.

Product Maturity

Validation at stage1 has been achieved for the MODIS Surface Reflectance product. Further details regarding MODIS land product validation for MCD19 data products are available from the MODIS Land Team Validation site.

Collection and Granule

Collection

Characteristic Description
CollectionCombined MODIS
DOI10.5067/MODIS/MCD19A1CMGL.061
File Size~90 MB
Temporal ResolutionDaily
Temporal Extent2000-02-24 to Present
Spatial ExtentGlobal
Coordinate SystemGeographic Latitude and Longitude
DatumN/A
File FormatHDF-EOS
Geographic DimensionsGlobal

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers25
Columns/Rows7200 x 3600
Pixel Size5600 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
BRF_B01 Bidirectional Reflectance Factor, Band01 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRF_B02 Bidirectional Reflectance Factor, Band02 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRF_B03 Bidirectional Reflectance Factor, Band03 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRF_B04 Bidirectional Reflectance Factor, Band04 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRF_B05 Bidirectional Reflectance Factor, Band05 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRF_B06 Bidirectional Reflectance Factor, Band06 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRF_B07 Bidirectional Reflectance Factor, Band07 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B01 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band01 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B02 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band02 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B03 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band03 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B04 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band04 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B05 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band05 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B06 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band06 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
BRFn_B07 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band07 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B01 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band01 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B02 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band02 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B03 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band03 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B04 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band04 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B05 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band05 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B06 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band06 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
NBAR_B07 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band07 N/A 16-bit signed integer -28672 N/A 0 to 16000 0.0001
QA QA bits N/A 8-bit unsigned integer 255 N/A 0 to 3 N/A
cSZA Cosine of Solar zenith angle N/A 16-bit signed integer -28672 N/A 0 to 10000 0.0001
cVZA Cosine View zenith angle N/A 16-bit signed integer -28672 N/A 0 to 10000 0.0001
Rel_AZ Relative azimuth angle N/A 16-bit signed integer -28672 N/A -18000 to 18000 0.01

Product Quality

Product quality information is described in Section 5.8 in the User Guide.

Known Issues

Known issues are described in Section 6 of the User Guide.


About the image

Combined MODIS Bidirectional Reflectance Factor Band 1-4-3 data from the MCD19A1CMGL product across the globe, July 9, 2009.

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Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)

Using the Data

Access Data

Citation

DOI: 10.5067/MODIS/MCD19A1CMGL.061