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True-color and AOD maps for an example scene covering South America

AVHRR Deep Blue papers published and featured in EOS

Figure shows (a) MODIS Aqua true-color image, (b) MODIS AOD at 550 nm from Collection 6, and (c) the new AVHRR AOD at the same wavelength from NOAA18, for a smoke event over South America on 7 September 2006. This shows an example of the comparability of the two products.

2 October, 2017

Time series of VIIRS gain correction factors

New paper published about MODIS/VIIRS cross-calibration and improvement of aerosol retrieval

Time series of spectral gain corrections developed in the study, to bring MODIS and VIIRS into radiometric consistency. Red lines indicate the correction and shaded grey the one standard deviation of correction estimates within each month.


AVHRR and MODIS seasonal AOD composites for 2006

AVHRR Deep Blue aerosol data version 1 data available

Image shows seasonal composites of 550 nm AOD from the new AVHRR Deep Blue aerosol product (left) and the MODIS Collection 6 product (right), for the year 2006. AVHRR data are Deep Blue over land and SOAR over water; MODIS data are Deep Blue over land and the MODIS ocean algorithm over water.


Figure 10 from paper, showing mitigation of bow-tie distortion

Paper about the MODIS bow-tie distortion and effect on aerosol retrievals

Illustration of the effects of aggregation technique on spatial distribution of retrieved DB AOD at 550 nm near the edge of a MODIS swath. Panel (a) shows a true-color image; panel (b) shows the AOD using the standard level 2 aggregation technique, while (c) and (d) show the result of techniques designed to increasingly mitigate the effects of the bow-tie distortion on the data. Panel (d) clearly shows the greatest similarity in structure between the AOD features/cloud gaps with the true-color image. Pixels without retrievals are shaded in gray.