DLR
EOC
Satellite
Earth Observation
Multispectral
Sentinel-2
MSI
Level 2A
MAJA
Atmospheric Correction
Cloud Detection
Germany
This collection contains Sentinel-2 Level 2A surface reflectances, which are computed for the country of Germany using the time-series based MAJA processor.
The MAJA product offers an alternative to the official ESA L2A product and has been processed with consideration of the characteristics of the Sentinel-2 mission (fast collection of time series, constant sensor perspective, and global coverage).
Assumptions about the temporal constancy of the ground cover are taken into account for a robust detection of clouds and a more flexible determination of aerosol properties. As a result, an improved determination of the reflectance of sunlight at the earth's surface (pixel values of the multispectral image) is derived. Further Sentinel-2 Level 2A data computed using MAJA are available on the the website.
References:
- Olivier Hagolle, Mireille Huc, Camille Desjardins, Stefan Auer, & Rudolf Richter. MAJA Algorithm Theoretical Basis Document (Version 1.0, 2017, December 7) Link
Items:
Surface reflectance, corrected for atmospheric effects, including adjacency effects and slope effects. All 10 and 20 m Sentinel 2 bands are available. The reflectance is scaled by a factor of 10000.
Bitwise geophysical mask: Bit 0: Water, Bit 1: All Clouds (except the thinnest), Bit 2: Snow, Bit 3: Shadows, Bit 4: Topographic Shadows, Bit 5: Unseen due to topography, Bit 6: Sun too low, Bit 7: Sun direction tangent to slope.
