The SENTINEL-3 SYN Level-1 product contains all 43 channels of OLCI and SLSTR Level-1B TOA radiance and brightness temperature measurements (21 OLCI channels and 22 SLSTR channels, including near nadir, oblique view and fire channels) in their acquisition geometry.
Table 1: Input radiometric channels (green lines correspond to SYN L2 input channels)
The SYN Level-2 products are produced at OLCI full resolution, for the daylight part of the orbit over land, and only take as input TOA reflectance data for the six solar reflective SLSTR bands at both nadir and forward views (a total of 12 input channels), and the 18 OLCI bands at all non-absorbing channels (i.e. excluding OLCI oxygen bands 14, 15 and water vapour band 20). These channels are listed in the first column of the above table.
The VGT-P and VGT-S products include TOA and surface reflectances defined for VGT channels:
Table 2: Definition of VGT channels