MODIS Collection 5 Dark Target

World Meteorological Organization


<h2>MODIS collection 5</h2>

The MODIS Aerosol Product monitors the ambient aerosol optical thickness over the oceans globally and over a portion of the continents. The additional Deep Blue product fills in some of the missing continental areas in Collection 5.1. Further, the aerosol size distribution is derived over the oceans. Daily Level 2 data are produced at the spatial resolution of a 10x10 km2 (at nadir)-pixel array. There are two MODIS Aerosol data product files: MOD04_L2, containing data collected from the Terra platform; and MYD04_L2, containing data collected from the Aqua platform.

Optical Depth Land and Ocean Mean

Satellite EOS Terra / EOS Aqua
Instrument(s) MODIS
Contact details lorraine.a.remer[at]
Parameter(s) AOD, Angstrom exponent, fine mode ratio (over ocean)
Aerosol algorithm MOD04_L2
Cloud screening

internal cloud mask

Aerosol model from AERONET
Retrieval assumptions bimodal aerosol model from one fine mode and one coarse mode
Retrieval limitations different retrievals over land and ocean, no retrieval over bright surfaces except for Deep Blue
Spatial, temporal coverage 2000-present / NRT, global
Spatial, temporal resolution 1km / 2330km swath / 16 days repeat cycle
Operations status operational / reprocessing
Validation status 2000-present online access to validation results
Quality control pixel-wise quality flag
last algorithm version collection 5 (04/2006) / collection 5.1 (05/2008)
last validation 2000-present


Algorithm description Product format description
Version explanation Validation summary


Product data access
Image / quicklook data access