SEVIRI PMAP
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Multi-Sensor algorithm combining GOME-2 Polarization Monitoring Devices (PMD) and AVHRR (+ IASI in future releases). Cloud fractions, cloud correction factors for GOME-2 PMD, aerosol classification (volcanic ash, dust, strong or weak coarse mode) are determined from AVHRR. A set of AOD for different microphysical properties is retrieved using one GOME-2 PMD band around 640nm. The best solution of this set is found using a fit over all GOME-2 PMD bands using both reflectances and stokes fractions.
Example result
| Satellite | METOP-A, METOP-B (EUMETSAT) |
| Instrument(s) | GOME-2, AVHRR |
| Contact details | Rosemary.Munro[at]eumetsat.int |
| Parameter(s) | AOD, volcanic ash flag |
| Aerosol algorithm | PMAp |
| Cloud screening |
AVHRR operational cloud mask + PMAp cloud screening |
| Aerosol model | up to 28 combinations of microphysical properties stored in a LUT, only a subset of 3-6 cases are fitted dependent on conditions |
| Retrieval assumptions | ocean surface described by Cox-Monk, case-I-water only, aerosol microphysics retrieval based on wavelength dependence of the reflectance and stokes fractions |
| Retrieval limitations | no retrievals for areas affected by glint, no retrieval in case of thick clouds, currently no retrieval over land (anticipated for next major version) |
| Spatial, temporal coverage | April 2014 - ongoing, NRT, ocean |
| Spatial, temporal resolution | 5x40km (METOP-A), 10x40km (METOP-B), 9:30 equator crossing time |
| Operations status | operational |
| Validation status | validated: AERONET, ECHAM model, MODIS |
| Quality control |
Continuous monitoring of NRT data against AERONET, continuous monitoring of instrument status and NRT processing quality indicators, error estimation |
| last algorithm version | 1.0.10 |
| last validation | 2/2015 |
| Algorithm description | Product format description |
| Version explanation | Validation summary |
| Publications |
| Product data access |
| Image / quicklook data access |