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VIIRS Version 1 Deep Blue aerosol data available

We are pleased to announce that the Version 1 VIIRS Deep Blue aerosol data set is available. Deep Blue product provides aerosol optical depth at 550 nm among other quantities, using the Deep Blue (DB) algorithm over land and Satellite Ocean Aerosol Retrieval (SOAR) algorithm over ocean.

Sample VIIRS image with retrieval results

New paper published describing VIIRS ocean aerosol data set

This figure shows example retrieval results at L2 resolution. (a) A true-color image, as well as retrieved (b) AOD at 550 nm and (c) FMF. L2 cells without QA = 3 retrievals are shaded in gray.

5 January 2018

Illustration of the effects of the sphericity assumption on aerosol retrievals

New paper published describing nonspherical dust aerosol models

This figure shows VIIRS SOAR AOD from (a) spherical and (b) spheroidal dust optical models, (c) AOD difference between the two, and (d) AOD longitudinal cross section along the dust transport path.

16 October 2017

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.