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Terra Product Descriptions: MODAODHD

Last update: February 9 2015

Data Set Short Name:
MODAODHD

Data Set Long Name:
MODIS/Terra valueadded Aerosol Optical Depth

Platform:
Terra

Instrument:
MODIS

Product Description:
The MODIS Near Real Time (NRT) Level-3 value-added Aerosol Optical Depth, MODAODHD, is a gridded product and is specifically designed for quantitative applications including data assimilation and model validation. The Naval Research Laboratory and the University of North Dakota developed MODAODHD based on MODIS Level 2 aerosol products. 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 MODAODHD granules are produced every six hours and timestamped 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 09:0015:00 UTC). Production is initiated as soon as the Level 2 inputs become available in the LANCE system.

Production Frequency:
4 files per day

Spatial Coverage:
Global

Spatial Resolution:
0.5 deg. at nadir

File Size MB:
0.206

Citation:

Dataset Originator/Creator:
The Naval Research Laboratory and the University of North Dakota/
MODIS Adaptive Processing System (MODAPS)

Data Authors:

Dataset DOI:
http://dx.doi.org/10.5067/MODIS/MODAODHD.NRT.006


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