Calendar Event Details
Dave Giles
Affiliation: Code 618/SSAI
Event Date: Tuesday, March 20, 2018
Location: Building 33, G133
Time: 11:00 AM
Automatic Quality Assurance of Sun Photometer Aerosol Optical Depth
The Aerosol Robotic Network (AERONET) is a surface-based network of Sun/sky radiometers measuring total column aerosol optical depth (AOD) (Holben et al. 1998). The network has expanded to over 500 sites worldwide over the past two decades and it provides fundamental remotely sensed measurements of AOD and retrievals of aerosol characteristics such as the size distribution, complex index of refraction and single scattering albedo. AERONET data are used for satellite retrieval evaluation (e.g., MODIS, VIIRS, MISR, OMI, CALIPSO), atmospheric correction (e.g., MODIS, LANDSAT), data synergism (e.g., MPLNET, SPARTANS), aerosol forecast model and reanalysis verification (GOCART, NAAPS, ICAP, MERRA-2), numerical weather prediction model analysis (e.g., NCEP, ECMWF, UKMET, GOES-5), and field campaign support (e.g., DISCOVER-AQ , KORUS-AQ, ORACLES). In Version 3, these data are publically available as Level 1.0 (unscreened), Level 1.5 (automatically quality controlled), and Level 2.0 (quality assured) data sets. The Version 3 AOD processing employs updated cloud screening quality controls that preserve fine mode aerosol (e.g., smoke, haze) and more efficiently remove homogeneous optically thin cirrus clouds from contaminating aerosol measurements. Furthermore, the AOD product, for the first time, utilizes a fully automated data quality control algorithm applied to the near-real time data products as well as the historical database. In addition to a description of Version 3 processing and comparisons of Version 3 AOD to Version 2, AERONET project updates will be discussed including Version 3 almucantar and hybrid sky scan inversion processing and lunar AOD measurements.
Posted or updated: Monday, March 19, 2018
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