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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.

Known Issues

Version Description

The MAIAC Land Surface BRF data products in a Climate Modeling Grid (CMG) were introduced in MODIS Version 6.1.

Product Summary

Platforms
Terra ,
Aqua
Instruments
MODIS
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
5600 Meters x 5600 Meters
Spatial Reference System(s)
MODIS Climate Modeling Grid (CMG)
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2000-02-24 to Present
Temporal Resolution
1 Day
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC) ,
MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/MODAPS)
Concept ID
C2565807727-LPCLOUD
Data State
ACTIVE
Number of Files/Granules
9438
Processing Level
3
Published
Updated
Science Keywords
Reflectance

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Lyapustin, A. (2023). MODIS/Terra+Aqua Surface Reflectance (Bands 1-7) from MAIAC, Daily L3 Global 0.05Deg CMG V061 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MCD19A1CMGL.061 Date Accessed: 2026-02-20

File Naming Convention

MCD19A1CMGL.A2025218.061.2025219193209.hdf

The file name begins with the Product Short Name (MCD19A1CMGL) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2025218), the Version of the data collection (061), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2025219193209), and the Data Format (hdf).

Documents

Publications Citing This Dataset

Filters
Title Year Author
Retrieval of UV-visible aerosol absorption using AERONET and OMI-MODIS synergy—Spatial and temporal variability across major aerosol environments Kayetha, V.
Importance of the legacy effect for assessing spatiotemporal correspondence between interannual tree-ring width and remote sensing products in the Sierra Nevada Wong, C. Y. S.
Exploratory analysis of carbonaceous PM2.5 species in urban environments—Relationship with meteorological variables and satellite data Amarillo, A.
Small anomalies in dry-season greenness and chlorophyll fluorescence for Amazon moist tropical forests during El Niño and La Niña Doughty, R.
Improved 1-km-resolution hourly estimates of aerosol optical depth using conditional generative adversarial networks Zhang, L.
Spatial covariation between solar-induced fluorescence and vegetation indices from Arctic-Boreal landscapes Maguire, A. J.
Adjustments to sif aid the interpretation of drought responses at the caatinga of Northeast Brazil Bontempo, E.
Changes in leaf functional traits of rainforest canopy trees associated with an El Nino event in Borneo Nunes, M. H.
First provisional land surface reflectance product from geostationary satellite Himawari-8 AHI Li, S.
SHOWING 9 OF 9

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
BRFn_B01 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band01 N/A int16 -28672 0 to 16000 0.0001
BRFn_B02 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band02 N/A int16 -28672 0 to 16000 0.0001
BRFn_B03 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band03 N/A int16 -28672 0 to 16000 0.0001
BRFn_B04 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band04 N/A int16 -28672 0 to 16000 0.0001
BRFn_B05 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band05 N/A int16 -28672 0 to 16000 0.0001
BRFn_B06 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band06 N/A int16 -28672 0 to 16000 0.0001
BRFn_B07 Bidirectional Reflectance Factor normalized to SZA=45° and nadir view, Band07 N/A int16 -28672 0 to 16000 0.0001
BRF_B01 Bidirectional Reflectance Factor, Band01 N/A int16 -28672 0 to 16000 0.0001
BRF_B02 Bidirectional Reflectance Factor, Band02 N/A int16 -28672 0 to 16000 0.0001
BRF_B03 Bidirectional Reflectance Factor, Band03 N/A int16 -28672 0 to 16000 0.0001
BRF_B04 Bidirectional Reflectance Factor, Band04 N/A int16 -28672 0 to 16000 0.0001
BRF_B05 Bidirectional Reflectance Factor, Band05 N/A int16 -28672 0 to 16000 0.0001
BRF_B06 Bidirectional Reflectance Factor, Band06 N/A int16 -28672 0 to 16000 0.0001
BRF_B07 Bidirectional Reflectance Factor, Band07 N/A int16 -28672 0 to 16000 0.0001
cSZA Cosine of Solar zenith angle N/A int16 -28672 0 to 10000 0.0001
cVZA Cosine View zenith angle N/A int16 -28672 0 to 10000 0.0001
NBAR_B01 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band01 N/A int16 -28672 0 to 16000 0.0001
NBAR_B02 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band02 N/A int16 -28672 0 to 16000 0.0001
NBAR_B03 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band03 N/A int16 -28672 0 to 16000 0.0001
NBAR_B04 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band04 N/A int16 -28672 0 to 16000 0.0001
NBAR_B05 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band05 N/A int16 -28672 0 to 16000 0.0001
NBAR_B06 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band06 N/A int16 -28672 0 to 16000 0.0001
NBAR_B07 Nadir BRDF adjusted Reflectance (NBAR), normalized to 1:30pm local time sun angle, Band07 N/A int16 -28672 0 to 16000 0.0001
QA QA bits N/A uint8 255 0 to 3 N/A
Rel_AZ Relative azimuth angle N/A int16 -28672 -18000 to 18000 0.01
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