MODIS/Aqua L3 Value-added Aerosol Optical Depth - NRTEntry ID: MYDAODHD_6.1NRT
Abstract: MODIS was launched aboard the Terra satellite on December 18, 1999 (10:30 am equator crossing time) as part of NASA's Earth Observing System (EOS) mission. MODIS with its 2330 km viewing swath width provides almost daily global coverage. It acquires data in 36 high spectral resolution bands between 0.415 to 14.235 micron with spatial resolutions of 250m(2 bands), 500m(5 bands),and 1000m (29 ... bands). MODIS sensor counts, calibrated radiances, geolocation products and all derived geophysical atmospheric and ocean products are archived at various DAACs and has been made available to public since April 2000.
The shortname for this level-3 MODIS aerosol product is MYDAODHD. The Naval Research Laboratory and the University of North Dakota developed this value-added aerosol optical depth dataset based on MODIS Level 2 aerosol products. The MYDAODHD is a gridded product and is specifically designed for quantitative applications including data assimilation and model validation. It is available through LANCE-MODIS. It offers several enhancements over the MODIS Level 2 data on which it is based. These enhancements include stringent filtering to reduce outliers, eliminate cloud contamination, and exclude conditions where aerosol detection is likely to be inaccurate; reduction of systematic biases over land and ocean by empirical corrections; reduction of random variation in AOD values by spatial averaging; quantitative estimation of uncertainty for each AOD data point.
The MxDAODHD granules are produced every six hours, and time-stamped 00:00, 06:00, 12:00, and 18:00 (all times UTC). Each granule includes MODIS observations from +/-3 hours from the timestamp (e.g. 12:00 product includes MODIS data from 09:00-15:00 UTC). Production is initiated as soon as the Level 2 inputs become available in the LANCE system.
See the LANCE-MODIS page for more dataset information:
Data Set Citation
Dataset Originator/Creator: LANCEMODIS
Dataset Title: MODIS/Aqua value-added Aerosol Optical Depth Product
Dataset Release Date: 2017-10-20T00:00:00.000Z
Dataset Release Place: MODAPS at NASA/GSFC
Dataset Publisher: The Land, Atmosphere Near real-time Capability for EOS (LANCE)
Dataset DOI: 10.5067/MODIS/MYDAODHD.NRT.061Online Resource: https://earthdata.nasa.gov/earth-observation-data/near-real-time/do...
Start Date: 2017-10-20
ATMOSPHERE > AEROSOLS > AEROSOL BACKSCATTER
ATMOSPHERE > AEROSOLS > AEROSOL EXTINCTION
ATMOSPHERE > AEROSOLS > AEROSOL OPTICAL DEPTH/THICKNESS
ATMOSPHERE > AEROSOLS > AEROSOL OPTICAL DEPTH/THICKNESS > ANGSTROM EXPONENT
ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES
ATMOSPHERE > AEROSOLS > AEROSOL RADIANCE
ATMOSPHERE > AEROSOLS > CARBONACEOUS AEROSOLS
ATMOSPHERE > AEROSOLS > CLOUD CONDENSATION NUCLEI
ATMOSPHERE > AEROSOLS > DUST/ASH/SMOKE
ATMOSPHERE > AEROSOLS > NITRATE PARTICLES
ATMOSPHERE > AEROSOLS > ORGANIC PARTICLES
ATMOSPHERE > AEROSOLS > PARTICULATE MATTER
ATMOSPHERE > AEROSOLS > SULFATE PARTICLES
ATMOSPHERE > ATMOSPHERIC RADIATION > OPTICAL DEPTH/THICKNESS
ATMOSPHERE > ATMOSPHERIC RADIATION > RADIATIVE FLUX
ATMOSPHERE > ATMOSPHERIC RADIATION > REFLECTANCE
Quality Overall NRT products match to operational with some expected minor differences from use of different ancillaries and ephemeris. There aren't any data gaps or data artifacts. Information on comparison of C6.1 Operational and NRT Atmospheric Products is posted at: http://lance.modaps.eosdis.nasa.gov/data_products/comparison.html. Information on comparison of C6 Operational and NRT Atmospheric and Land Products is posted at: http://lance3.modaps.eosdis.nasa.gov/data_products/comparison_atmos... and http://lance3.modaps.eosdis.nasa.gov/data_products/comparison_land.....
Access Constraints Users need to register with Earthdata to access data. Please visit the Earthdata Login at https://earthdata.nasa.gov/urs/register to register for a username and password.
Use Constraints None. See disclaimer: https://earthdata.nasa.gov/data/near-real-time-data/about-lance/dis....
Data Set Progress
Distribution Media: Online (FTP)
Distribution Format: HDF-EOS
Fees: No Fee
Role: TECHNICAL CONTACT
Email: MODAPSUSO at lists.nasa.gov
MODAPS User Support Team NASA/GSFC Mail Code: 619
Province or State: MD
Postal Code: 20771
Role: TECHNICAL CONTACT
Role: TECHNICAL CONTACT
Role: METADATA AUTHOR
Hyer, E. J., J. S. Reid, and J. Zhang (2011-01-01T00:00:00.000Z), An over-land aerosol optical depth data set for data assimilation by filtering, correction, and aggregation of MODIS Collection 5 optical depth retrievals, Atmospheric Measurement Techniques, doi:10.5194/amt-4-379-2011
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2017-10-13
Last DIF Revision Date: 2019-02-12