[Location: Location_Category='GEOGRAPHIC REGION', Location_Type='GLOBAL']
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NRT L3 Value-added Aerosol Optical Depth Entry ID: MODAODHD |
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Summary
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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 MODAODHD. 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. MODAODHD 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. he 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 data set information: http://earthdata.nasa.gov/data/near-real-time-data/data-products/modis or visit the product page: http://earthdata.nasa.gov/about-eosdis/news/nrt-value-added-modis-aerosol-optical-depth-product-available |
Related URL
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Link:
GET DATA
>
LANCE
Description: Near real-time (NRT) data are available from MODAPS for certain Aqua and Terra MODIS L0, L1, L2, L2G, and L3 products. Whereas the standard MODIS forward processing acquires 2-hour L0 files for Aqua and Terra from EDOS within 7-8 hours of real time, LANCE-MODIS acquires session-based L0 files from EDOS and the end of the session is available within 10-30 minutes after real time. Link: GET DATA > LAADS Description: Web site for MODIS Collection 4 atmosphere and Collection 5 L1B, Geo and atmosphere data ordering. Web site for Suomi NPP VIIRs, ENVISAT MERIS, and Ancillary data ordering. Link: VIEW PROJECT HOME PAGE Description: Land Atmosphere Near Real-Time Capability for EOS Link: VIEW RELATED INFORMATION Description: View data set description. |
Geographic Coverage
| N: 90.0 | S: -90.0 | E: 180.0 | W: -180.0 |
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Data Set Citation
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Dataset Title:
MODIS/Terra NRT value-added Aerosol Optical Depth Product
Version: Collection 5.1 Dataset DOI: 10.5067/MODIS/MODAODHD.051 Online Resource: http://earthdata.nasa.gov/about-eosdis/news/nrt-value-added-modis-a... |
Temporal Coverage
| Start Date: 2012-12-29 |
Location Keywords
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GEOGRAPHIC REGION
> GLOBAL
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Data Resolution
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Latitude Resolution:
0.5 deg
Longitude Resolution: 0.5 degree Temporal Resolution: 6 hr |
Science Keywords
| ATMOSPHERE >AEROSOLS >AEROSOL BACKSCATTER [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL EXTINCTION [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL OPTICAL DEPTH/THICKNESS [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL OPTICAL DEPTH/THICKNESS >ANGSTROM EXPONENT [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL PARTICLE PROPERTIES [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL RADIANCE [Definition] |
| ATMOSPHERE >AEROSOLS >CARBONACEOUS AEROSOLS [Definition] |
| ATMOSPHERE >AEROSOLS >CLOUD CONDENSATION NUCLEI [Definition] |
| ATMOSPHERE >AEROSOLS >DUST/ASH/SMOKE [Definition] |
| ATMOSPHERE >AEROSOLS >NITRATE PARTICLES [Definition] |
| ATMOSPHERE >AEROSOLS >ORGANIC PARTICLES [Definition] |
| ATMOSPHERE >AEROSOLS >PARTICULATE MATTER [Definition] |
| ATMOSPHERE >AEROSOLS >SULFATE PARTICLES [Definition] |
| ATMOSPHERE >ATMOSPHERIC RADIATION >OPTICAL DEPTH/THICKNESS [Definition] |
| ATMOSPHERE >ATMOSPHERIC RADIATION >RADIATIVE FLUX [Definition] |
| ATMOSPHERE >ATMOSPHERIC RADIATION >REFLECTANCE [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
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Platform
| TERRA >Earth Observing System, TERRA (AM-1) [Information] |
Instrument
| MODIS >Moderate-Resolution Imaging Spectroradiometer [Information] |
Project
| DODS >Distributed Oceanographic Data System [Information] |
| EOSDIS >Earth Observing System Data Information System [Information] |
| ESIP >Earth Science Information Partners Program [Information] |
| TERRA >Earth Observing System (EOS), TERRA [Information] |
Quality
| The 'version 051' or 'collection 051' product is the latest version available. The quality of this version 051 product is established as 'Validated' . This means its accuracy has been assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. Results are peer-reviewed and published at scientific conferences and workshops. |
Use Constraints
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Near real-time products are generated and available to registered users via FTP with an average latency of less than 3 hours. These products should be used in fields where timeliness of data is vital to the program, such as numerical weather prediction and forecasting, monitoring of natural hazards, disaster relief, agriculture and homeland security. Standard science products should be used for latency independent research and applications, long term studies and trend analyses. Standard products are created using the best available ancillary, calibration and ephemeris information and are an internally consistent, well-calibrated record of the Earth’s geophysical properties to support science. MODIS standard products are available from LAADS Web at: http://ladsweb.nascom.nasa.gov/ |
Keywords
| AEROSOL OPTICAL DEPTH |
| AEROSOL OPTICAL THICKNESS |
| AEROSOL INDEX |
| Near Real Time (NRT) |
| LANCE |
| EOSDIS |
Data Set Progress
| IN WORK |
Originating Center
| LANCE-MODIS |
Data Center
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L1 and Atmosphere Archive and Distribution System,Biospheric Information Systems Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
[Information]
Data Center URL: http://ladsweb.nascom.nasa.gov/ Dataset ID: MODAODHD Collection 5.1
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Personnel
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ASAD
ULLAH Role: DIF AUTHOR Phone: 302-731-2915 Email: asad.ullah at sigmaspace.com |
Creation and Review Dates
DIF Creation Date:
2001-08-28
Last DIF Revision Date:
2013-05-07
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