SeaWIFS Deep Blue version 4
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The SeaWiFS ‘Deep Blue’ (SWDB) dataset provides aerosol optical thickness and related information from the SeaWiFS sensor (1997-2010). Coverage is provided over land using the Deep Blue algorithm and over ocean using the SOAR algorithm, with near-global daily coverage (except gaps due to cloudiness, etc). Level 2 data are available at nominal 13.5x13.5 km resolution, and daily and monthly Level 3 products are also available at 0.5° and 1° resolutions.
Example result
| Satellite | SeaStar (NASA) |
| Instrument(s) | SeaWIFS |
| Contact details | christina.hus[at]nasa.gov (secondary:andrew.sayer[at]nasa.gov) |
| Parameter(s) |
AOD, Ångström exponent; land: single scattering albedo; ocean: fine mode volume fraction |
| Aerosol algorithm | Land: Enhanced Deep Blue; Ocean: SOAR |
| Cloud screening |
Sparial variance and brightness tests |
| Aerosol model |
Land: A suite of aerosol models for dust, smoke, and continental aerosols; ocean: Three bimodal models (maritime, dust-dominated, fine-dominted) based on AERONET inversions |
| Retrieval assumptions |
Bimodal aerosol model; Land: surface database/spectral relationship; Ocean: surface model dependent on wind speeds |
| Retrieval limitations |
Coverage limited by sensor spatial/spectral resolution, and desire to achieve a conservative cloud mask (i.e. less cloud contamination than some other data sets but occasional misidentification of cloud-free scenes as cloudy) |
| Spatial, temporal coverage | September 1997-December 2010, global; a few temporary gaps |
| Spatial, temporal resolution |
13.5x13.5 km pixel, ~1,500 km swath (near-global daily coverage), 16 day orbital repeat cycle |
| Operations status | Reprocessing |
| Validation status | Version 3 validation published. Version 4 is very similar to version 3; version 4 validation not published, but results from version 3 hold |
| Quality control | Pixel-wise quality flag, and pre-filtered datasets available within file |
| last algorithm version | Version 4 (08/2013) |
| last validation | 08/2013 |
| Algorithm description (land, ocean) | Product format description |
| Version explanation | Validation summary (land, ocean) |
| Publications |
| Product data access |
| Image / quicklook data access |