User Guides - Sentinel-3 OLCI - Data Formats - Sentinel Online
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.
Table 5: Description and content of the OLCI product package. The estimated size corresponds to a half orbit without consideration about compression, with NRT/NTC less than 3/48 hours after measurement by satellite
Level |
Name of Product Package |
Main Content | Use | Latency |
Estimated Size per half Orbit |
Product Dissemination Unit (PDU) |
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 |
USER |
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