AVHRR AOD
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Daily, weekly, and monthly global 1 degree maps of Aerosol Optical Thickness derived from the AVHRR instrument onboard the NOAA satellites. The weekly products are based on a composite of one week's worth of data, and the monthly mean products are based on the average of each week's data for the month. Currently they are created from AVHRR channel 1, 2 and 3 optical thickness retrievals from AVHRR 4-km global area coverage (GAC) data.
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Example result / latest result
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| Satellite: | NOAA (NOAA) |
| Instrument(s): | AVHRR |
| Instrument/algorithm PI: | A. Ignatov, NOAA |
| Contact details: | alex.ignatov[at]noaa.gov |
| Parameter(s): | AOD |
| Aerosol algorithm: | AEROBS |
| Cloud screening: | CLAVR/CLAVR-x |
| Aerosol model: | non-absorbing w. monomodal lognormal size distribution |
| Retrieval assumptions: | ocean reflectance is accurately calculated |
| Retrieval limitations: | glint area (<40° glint angle) & solar side of orbit are excluded; View and solar zenith angles > 60° are excluded |
| Spatial, temporal coverage: | 1988 onward, global oceans |
| Spatial, temporal resolution: | 8 km/daily, 110 km analysis/day/week, month |
| Operations status: | operational / reprocessing |
| Validation status: | AERONET & other satellite inter-comparison studies |
| Quality control: | self- and inter-consistency checks |
| last algorithm version: | third-generation algorithm (09/2000) |
| last validation: | 07/2002 |