| PARAMETER | Surface type |
| NETCDF NAME | surf_type_l1b_echo_plrm |
| DESCRIPTION | The surface type is computed using the land/sea mask of the SENTINEL-3 mission. The latitude and longitude of the altimeter measurement are used to determine the nearest grid point in the land/sea mask file. The surface type is set to the surface type reported for this nearest grid point. |
| UNITS | (0b): open ocean or semi-enclosed seas (1b): enclosed seas or lakes (2b): continental ice (3b): land |
| PARAMETERS RELATED | none |
| ALGORITHM DETAILED DESCRIPTION | GEN_ENV_SUR_01 |
| PARAMETER DETAILED DESCRIPTION | Sentinel-3 Core PDGS Instrument Processing Facility (IPF) Implementation. Product Data Format Specification. SRAL/MWR Level 1 & 2 Instrument Products |