The OLCI data format follows the format defined for each Sentinel-3 product in the PDGS product specification and is based on SENTINEL-SAFE.
SENTINEL-SAFE is based on the XML Formatted Data Units (XFDU) developed by the Consultative Committee for Space Data Systems (CCSDS). SENTINEL-SAFE is a profile of XFDU, and it restricts the XFDU specifications for specific utilisation in the EO domain, providing semantics in the same domain to improve interoperability between ground segment facilities.
Figure 2: XFDU package schema
Each product package includes:
- a manifest file containing a metadata section and a data object section
- measurement data files
- annotation data files, if defined
- for Level-0 only, representation data files (XML files describing the binary information).
Sentinel-3 user products are disseminated in Product Dissemination Units (PDU), in order to ease the online dissemination and data handling for the users. The PDU is a portion of data and is defined per product type.
Size per half Orbit
|Product Dissemination Unit
|0||OL_0_EFR||Full Resolution ISPs||INTERNAL||NRT||9.5GB||N/A|
|OL_0_CR0||Calibration with no spectral relaxation||502Mb|
|OL_0_CR1||Calibration with spectral relaxation||240Mb|
|1||OL_1_EFR||Full Resolution TOA Reflectance||NRT/NTC||28.5GB||Frame 3 mn|
|OL_1_ERR||Reduced Resolution TOA Reflectance||2.3GB||Dump (full daylight orbit)|
|OL_1_RAC||Dark offset and gain coefficients from radiometric calibration||INTERNAL||NRT||1Mb||N/A|
|OL_1_SPC||Wavelength characterization from spectral calibration||27Mb|
|2||OL_2_WFR||Full Resolution Water and Atmosphere geophysical products||USER||NRT/NTC||28.4GB||Frame 3 mn|
|OL_2_LFR||Full Resolution Land and atmosphere geophysical products||8.8GB|
|OL_2_WRR||Reduced Resolution Water and Atmosphere geophysical products||2.4GB||Dump (full daylight orbit)|
- EFR Earth Observation Full Resolution
- ERR Earth Observation Reduced Resolution
- RAC Radiometric Calibration
- SPC Spectral Calibration
- WFR Water Full Resolution
- LFR Land Full Resolution
- WRR Water Reduced Resolution
- LRR Land Reduced Resolution