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GOME-2 surface LER database

 
   
 
European Space Agency

page last modified:
24 March 2017
     

The GOME-2 surface LER database contains the Lambertian-equivalent reflectivity values at twenty-one 1-nm wide wavelength bins between 335 and 772 nm. The Lambertian-equivalent reflectivities (LERs) were derived from GOME-2 data using the Doubling-Adding KNMI (DAK) polarised radiative transfer code. The model consists of an atmosphere for which Rayleigh scattering and ozone absorption is taken into account, and which is bounded below by a Lambertian surface. The surface LER is available for each month of the year and for the following wavelengths: 335, 340, 354, 367, 380, 388, 416, 425, 440, 463, 494, 510, 526, 546, 555, 564, 610, 640, 670, 758, and 772 nm -- a total of 21 wavelength bands.


Some examples of the database:

Examples of the GOME-2 surface LER: dependence on the month of the year (left) and dependence on the wavelength (right).

Archive:

The database is available as a single HDF-5 file (376 MB). The format and the contents of these files are both explained here. The current version of the database is 1.6. The version of the GOME-2 level-1 data that were used is 5.3.

Next to the normal GOME-2 surface LER product, there also exists a GOME-2 surface LER product based on the PMD bands. This database is also available as an HDF-5 file (861 MB). The current version of the database is 1.6. Note that some discrepancies between the radiometric calibration of the main science channels and the PMD bands have been reported in the past (PDF).

The GOME-2 surface LER databases are provided by KNMI in the framework of the EUMETSAT Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M SAF).


Data use / Citation:

The GOME-2 surface LER database is free to use for commercial and non-commercial purposes. If you use the database for a publication (research or otherwise), or for any other purpose, please refer to the following publication:

L.G. Tilstra, O.N.E. Tuinder, P. Wang, and P. Stammes, Surface reflectivity climatologies from UV to NIR determined from Earth observations by GOME-2 and SCIAMACHY, J. Geophys. Res., doi:10.1002/2016JD025940, 2017, accepted.

We request that you include the following acknowledgement: "We acknowledge the free use of the GOME-2 surface LER database provided through the O3M SAF of EUMETSAT. The GOME-2 surface LER database was created by the Royal Netherlands Meteorological Institute (KNMI)."


Documentation:

  • L.G. Tilstra, O.N.E. Tuinder, P. Wang, and P. Stammes, Surface reflectivity climatologies from UV to NIR determined from Earth observations by GOME-2 and SCIAMACHY, J. Geophys. Res., doi:10.1002/2016JD025940, 2017, accepted.