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Description

The MCD19A1 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MCD19A1 Version 6.1 data product.

The MCD19A1 Version 6 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-Angle Implementation of Atmospheric Correction (MAIAC) Land Surface Bidirectional Reflectance Factor (BRF) gridded Level 2 product produced daily at 500 meter (m) and 1 kilometer (km) pixel resolutions. The MCD19A1 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 Land Surface BRF products provide an estimate of the surface spectral reflectance as it would be measured at ground-level in the absence of atmospheric scattering or absorption.

The MCD19A1 MAIAC Surface Reflectance data product includes 34 Science Dataset (SDS) layers: surface reflectance for bands 1-12, BRF uncertainty for bands 1-2, snow fraction, snow grain size, snow fit, Quality Assessment (QA) bits at 1 km, surface reflectance for bands 1-7 at 500 m, cosine of solar zenith angle, cosine of view zenith angle, relative azimuth angle, scattering angle, solar azimuth angle, view azimuth angle, glint angle, RossThick/Li-Sparse (RTLS) volumetric kernel, and RTLS geometric kernel at 5 km. A low-resolution browse image is also included showing surface reflectance band combination 1, 4, 3 created using a composite of all available orbits.

Each SDS layer within each MCD19A1 Hierarchical Data Format 4 (HDF4) file contains a third dimension that represents the number of orbit overpasses. This factor could affect the total number of bands for each SDS layer.

Known Issues

  • The longname in the internal metadata is provided incorrectly. The correct longname is "MODIS/Terra and Aqua MAIAC Land Surface BRF Daily L2G Global 500 m and 1 km SIN Grid."
  • Known issues are described on page 14 of the User Guide.
  • For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.

Version Description

Terra and Aqua combined MAIAC data products were introduced in MODIS Version 6.

Product Summary

Platforms
Terra ,
Aqua
Instruments
MODIS
Spatial Extent

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

Spatial Resolution
500 Meters x 500 Meters
Spatial Reference System(s)
MODIS Sinusoidal Tiling System
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2000-02-26 to 2023-02-17
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
C2763289460-LPCLOUD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
2G
Published
Updated
Science Keywords
Reflectance ,
Snow Grain Size ,
Snow Cover

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., & Wang, Y. (2018). MCD19A1 MODIS/Terra+Aqua Land Surface BRF Daily L2G Global 500m and 1km SIN Grid V006 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MCD19A1.006 Date Accessed: 2026-02-16

File Naming Convention

MCD19A1.A2002281.h32v11.006.2018017112924.hdf

The file name begins with the Product Short Name (MCD19A1) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2002281), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h32v11), the Version of the data collection (006), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2018017112924), 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.
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.
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.
Adjustments to sif aid the interpretation of drought responses at the caatinga of Northeast Brazil Bontempo, E.
First provisional land surface reflectance product from geostationary satellite Himawari-8 AHI Li, S.
Changes in leaf functional traits of rainforest canopy trees associated with an El Nino event in Borneo Nunes, M. H.
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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
cosSZA Cosine of Solar zenith angle (5 km) N/A int16 -28672 0 to 10000 0.0001
cosVZA Cosine View zenith angle (5 km) N/A int16 -28672 0 to 10000 0.0001
Fg RTLS geometric kernel (5 km) N/A float32 -99999 -100 to 100 N/A
Fv RTLS volumetric kernel (5 km) N/A float32 -99999 -100 to 100 N/A
Glint_Angle Glint Angle (5 km) N/A int16 -28672 -18000 to 18000 0.01
RelAZ Relative azimuth angle (5 km) N/A int16 -28672 -18000 to 18000 0.01
SAZ Solar Azimuth Angle (5 km) N/A int16 -28672 -18000 to 18000 0.01
Scattering_Angle Scattering Angle (5 km) N/A int16 -28672 -18000 to 18000 0.01
Sigma_BRFn1 BRFn uncertainty over time, for band 1 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sigma_BRFn2 BRFn uncertainty over time, for band 2 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Snow_Fit Land+Snow linear mixture model RMSE in bands 1,5,7 (1 km) N/A int16 -28672 0 to 30000 0.0001
Snow_Fraction Snow fraction (1 km) N/A int16 -28672 0 to 10000 0.0001
Snow_Grain_Size Snow grain diameter (1 km) mm int16 -28672 0 to 32767 0.001
Status_QA QA bits (1 km) N/A uint16 0 1 to 65535 N/A
Sur_ref2 Surface reflectance for band 2 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref3 Surface reflectance for band 3 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref4 Surface reflectance for band 4 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref5 Surface reflectance for band 5 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref6 Surface reflectance for band 6 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref7 Surface reflectance for band 7 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref8 Surface reflectance for band 8 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref9 Surface reflectance for band 9 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref10 Surface reflectance for band 10 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref11 Surface reflectance for band 11 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_ref12 Surface reflectance for band 12 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl1 Surface reflectance for band 1 (1 km) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m1 Surface reflectance 500 m for band 1 (500 m) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m2 Surface reflectance 500 m for band 2 (500 m) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m3 Surface reflectance 500 m for band 3 (500 m) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m4 Surface reflectance 500 m for band 4 (500 m) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m5 Surface reflectance 500 m for band 5 (500 m) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m6 Surface reflectance 500 m for band 6 (500 m) N/A int16 -28672 -100 to 16000 0.0001
Sur_refl_500m7 Surface reflectance 500 m for band 7 (500 m) N/A int16 -28672 -100 to 16000 0.0001
VAZ View Azimuth Angle (5 km) N/A int16 -28672 -18000 to 18000 0.01
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