GOES-East Downward Longwave Irradiance
| IDENTIFICATION |
| Description | Estimation of the downward longwave irradiance reaching the Earth surface derived from the data of the imager on board the geostationary satellite GOES. Algorithm is a bulk parametrization that uses NWP model outputs to calculate a clear sky Downward Longwave Irradiance (DLI), corrected according to satellite derived cloud information.
The hourly product is interpolated at rounded UT hours, by a pixel dependant temporal interpolation between two consecutive satellite images.
The value in the daily product is the integration of all the hourly values in the UT day.
The product is remapped onto a 0.05° regular grid and expressed in W/m2. |
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| Product type | Archived NRT product |  |
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| Status | Discontinued |
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| Identifier | OSI-305 |
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| Acronym | GOES-E DLI |
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| Acronym for EDC (APNM) | OSIDDLI |
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| Product navigator reference | EO:EUM:DAT:GOES:OSIHDLI |
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| CHARACTERISTICS |
| Processing level | L3 |
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| Satellite input | GOES-E/IMAGER |
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| Other input | ECMWF outputs (temperature, humidity and aerosols profiles) |
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| Frequency | 24 per day + 1 per day |
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| Timeliness | 2 h |
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| Spatial coverage | West Atlantic East Pacific 60N-60S 135W-15W |
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| Spatial sampling | 0.05° Lat-Lon |
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| Characteristics & methods | Bulk parametrization |
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| ACCURACY REQUIREMENTS |
| Thresold accuracy | monthly relative bias : 10%, monthly relative Std. Deviation :20% |
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| Target accuracy | monthly (TBC) relative bias : 5%, monthly relative Std. Deviation :10% |
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| Optimal accuracy | monthly relative bias : 0%, monthly relative Std. Deviation : 3% |
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| Verification/validation method | routine comparison with pyrgeometer measurements |
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| DATA ACCESS |
| Diffusion mean(s) and format(s) | EUMETCast (GRIB2)
LML FTP Server (NetCDF4)
EDC (GRIB2)
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| Main FTP server | Ifremer FTP server | Other FTP server,
other mean(s) to access main server |
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| EUMETCast | EUMETCast | Discovery mean(s) | |
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| EUMETSAT Data Centre | EDC |
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| Applications and users | Ocean atmosphere studies. | OSI SAF Producer | Météo-France |
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| HISTORY, COMMENTS |
- NetCDF-4 files are available on Ifremer FTP server in the same directories as the NetCDF-3 ones from 17/07/2017.
- NetCDF-4 files are available on EUMETCast since 05/10/2017 in parallel of the dissemination in GRIB format.
- Stop of NetCDF-3 and GRIB formats is planned on 2017-12-14T07:00:00Z
- EUMETSAT product navigator reference for daily product : EO:EUM:DAT:GOES:OSIDDLI
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| First product date | 06/12/2011 |
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| Last product date | 14/12/2017 |
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