The SLSTR data format follows the format defined for each Sentinel-3 product, i.e. the PDGS product specification, and is based on SENTINEL-SAFE. Each product package includes:
- a manifest file containing a metadata section and a data object section
- measurement data files
- annotation data files (except for SL_2_WST_)
- representation data files (XML files describing the binary information)(Level-0 only).
User product, generated for operational dissemination to Sentinel-3 users, has to be distinguished from the internal product, which is only used internally for normal processing.
Following the three main processes, there are three main data packages: Level-0, Level-1 and Level-2.
The 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.
| Name of Product Package |
Main Content | Availability | Latency | Estimated Size per orbit | Product Dissemination Unit |
| SL_0_SLT | Full resolution ISPs | Internal | NRT | 7.2 GB | N/A |
| SL_1_RBT | Brightness temperatures and radiances | User | NRT/NTC | 44.5 GB | Frame 3 mn for both NRT and NTC |
| SL_2_WCT | Sea surface temperature (single and dual view, 2 and 3 channels) |
Internal | NRT/NTC | 4.1 GB | N/A |
| SL_2_WST | Level-2P sea surface temperature (GHRSST-like) | User | NRT/NTC | 2.2 GB | NRT = Frame 3 mn NTC = Full orbit (from pole to pole) |
| SL_2_LST__ | Land surface temperature parameters | User | NRT/NTC | 5 GB | NRT = Frame 3 mn NTC = Full orbit (from pole to pole) |
| SL_2_FRP | Fire radiative power | User | NRT/NTC | 4.4 GB (TBC) | NRT = Frame 3 mn (TBC) NTC = Full orbit (pole to pole) (TBC) |
| SL_2_AOD | Aerosol Optical Depth | User | NRT | 0.079 GB (TBC) | NRT + Frame 3 min (TBC) Note: an AOD NTC product will be generated by the Level-2 synergy processor, exploiting the synergy between OLCI and SLSTR. Details on Level-2 SYN page |