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VIIRS

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

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.

 

Validation of the ASHE algorithm, from Lee et al (2016)

New papers in Aerosol and Air Quality Research special issue

This figure from Lee et al. (2016) shows (top) time series of ASHE and MPLNET aerosol top height (ATH), (middle) VIIRS and AERONET AOD, and (bottom) ASHE and AERONET SSA from the complete algorithm (left) and simplified algorithm (right). Only best QA data are shown. The MPLNET and AERONET data are presented only if there are ASHE retrieved ATH data, while the gray dots represent the full MPLNET/AERONET data records. The black vertical line separates 2013 and 2014.

 

Case study of the ASHE algorithm over North America

Paper about aerosol height and single scattering albedo retrieval

Application of the aerosol single-scattering albedo and height estimation (ASHE) algorithm to a smoke event observed over North America on 16 July 2014. (a) VIIRS RGB image with MODIS/Aqua fire mask in red dots, (b) VIIRS Deep Blue AOD, (c) OMPS UVAI, (d) retrieved SSA and (e) ATH from ASHE, and (f) CALIOP total attenuated backscatter profile with CALIOP-derived (black circle) and ASHE-retrieved aerosol heights (cyan circle).