Combined Aqua & Terra Product: MCD19A2N
Last update: May 20, 2019
Data Set Short Name:
MCD19A2N
Data Set Long Name:
MODIS/Terra+Aqua Land Aerosol Optical Depth Daily L2G Global 1km SIN Grid
Platform:
Terra + Aqua
Instrument:
MODIS
Product Description:
The Moderate Resolution Imaging Spectroradiometer (MODIS) Near Real Time (NRT) Combined Terra and Aqua Multi-Angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth gridded Level 2 product (MCD19A2N) produced daily at 1 kilometer (km) pixel resolutions. The MCD19A2N product provides the atmospheric properties and view geometry used to calculate the MAIAC Land Surface Bidirectional Reflectance Factor (BRF) or surface reflectance, MCD19A1N product.
The MCD19A2N AOD data product contains the following Science Dataset (SDS) layers: blue band AOD at 0.47 µm, green band AOD at 0.55 µm, AOD uncertainty, fine mode fraction over water, column water vapor over land and clouds (in cm), smoke injection height (m above ground), AOD QA, AOD model at 1km, cosine of solar zenith angle, cosine of view zenith angle, relative azimuth angle, scattering angle, and glint angle at 5km. A low-resolution browse image is also included showing AOD of the blue band at 0.47 µm created using a composite of all available orbits.
Each SDS layer within each MCD19A2N 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.
file_naming_convention = MCD19A2N.AYYYYDDD.hHHvVV.CCC.hdf
- AYYYYDDD = Acquisition Year and Day of Year
- HHMM = Hour and minute of acquisition
- hXXvYY = Sinusoidal Tile Identifier (horizontalXXverticalYY)
- VVV = Collection Version number
- hdf = HDF-EOS (version 4) file format
For additional information consult https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/MCD19A2/
And, for OPS and NRT MAIAC data comparison check https://lance3.modaps.eosdis.nasa.gov/data_products/MCD19AxOPSNRTMay2019update.php
Production Frequency:
~280 file per day
Spatial Coverage:
Global
Spatial Resolution:
1km
File Size (MB):
~5
Citation:
Lyapustin, A., Wang, Y. (2019). MCD19A2N MODIS/Terra+Aqua MODIS/Terra+Aqua Land Aerosol Optical Depth Daily L2G Global 1km SIN Grid [Data set]. NASA EOSDIS NRT MODAPS. doi: 10.5067/MODIS/MCD19A2N.NRT.006
Dataset Originator/Creator:
MODIS Land Science Team/MODIS Adaptive Processing System (MODAPS)
Data Authors:
Alexei Lyapustin
Dataset DOI:
http://dx.doi.org/10.5067/MODIS/MCD19A2N.NRT.006
