User Products Dissemination Concept - Sentinel-3 - Missions
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. Three kinds of PDU are defined for SENTINEL-3 products: "frame", "stripe" (see Figure 1) and "tile".
- A frame is identified by means of a fixed reference system based in along-track coordinates and along-orbit cycle coordinate. The along-track coordinate identifies the product frame start point with respect to a fixed orbit position (like the ANX). Each frame is stepped by a constant time interval along the orbit track. The along-orbit cycle coordinate identifies the relative orbit number within the orbit cycle.
- A stripe coincides either with the acquisition dump or with a defined acquisition time segment whose length may differ according to the instrument type (for example full orbit pole to pole, half orbit etc...). A special case of stripe is provided by the Vegetation like product (called VGT-P) where the stripe is mapped on a Plate Carrée geographical projection.
- Tiles are defined only for Vegetation-like 1 or 10 days synthesis products, VGT-S1 (SY_2_VG1) and VGT-S10 (SY_2_V10), provided on a Plate Carrée map projection. A tile corresponds to a geographical subset of the synthesis image as shown in Figure 2.

Figure 1: Example of PDUs for OLCI L1B products: stripe and frame concept

Figure 2: Example of PDUs for Vegetation-like products
- Sentinel Data Access
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Sentinel-3 Product Notices:
- OLCI Level-2 NRT and NTC
- SLSTR Level-2 NRT and NTC
- OLCI Level-1B NRT and NTC
- SLSTR Level-1B NRT and NTC
- STM Level-1 NRT, STC and NTC
- STM Level-2 NRT, STC and NTC -
Sentinel-3 Fact Sheets:
- Altimetry Data Access and Products
- OLCI Data Access and Products
- SLSTR Data Access and Products
- Synergy Data Access and Products - Sentinel-3 Mission Requirements Traceability Document
- Sentinel Products List
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Sentinel-3 Data Product Quality Reports:
- Altimetry
- OLCI
- SLSTR - Sentinel-3 ESA Special Publication