The table below summarises the geophysical units used in the OLCI Level-2 products.
| Product Name | Acronym | Units | |
| MARINE AND INLAND WATERS | water-leaving reflectance | Rxxx | dimensionless |
| Total backscattering coefficient | BBP560_M07 BBP443_NN |
m-1 | |
| Total absorption coefficient | ATOT443_NN | m-1 | |
| Phytoplankton absorption coefficient | APH443_NN | m-1 | |
| CDM absorption coefficient | ADG443_NN | m-1 | |
| Humic material absorption coefficient | AD443_NN | m-1 | |
| Algal pigment concentration | CHL_OC4ME CHL_NN |
mg(Chl a).m-3 | |
| Total suspended matter concentration | TSM_NN | g.m-3 | |
| Diffuse attenuation coefficient | KD490_M07 KD490_L05 |
m-1 | |
| Heated layer depth | ZHL | m | |
| Water transparency | ZSD | m | |
| Photosynthetically active radiation | PAR | µEinstein.m-2.s-1 | |
| Aerosol optical thickness | T865 | Dimensionless | |
| Aerosol Angström exponent | A865 | Dimensionless | |
| Integrated water vapour column | IWV | kg.m-2 | |
| Ocean products quality and science flags | WQSF | Dimensionless | |
| LAND | Green Instantaneous Fraction of Absorbed Photosynthetically Active Radiation | GI-FAPAR | Dimensionless |
| Rectified Reflectance | RC681, RC865 | Dimensionless | |
| OLCI Terrestrial Chlorophyll Index | OTCI | Dimensionless | |
| Integrated water vapour column | IWV | kg.m-2 | |
| Land products quality and science flags | LQSF | Dimensionless |
Other general quantities have the units shown in the table below.
| Quantity | Unit | Notation | Description |
| Irradiance | 10-3 W.m-2.μm-1 | IU | spectral irradiance unit |
| Radiance | 10-3 W.m-2.sr-1.μm-1 | LU | spectral radiance unit |
| Time | jd or MJD | jd or MJD | modified Julian date 2000 |
| 10-6s | (1.e-6)s | microsecond | |
| Distance | 10-9m | nm | nanometre (wavelength) |
| 10-6m | μm | micrometre (wavelength) | |
| m | m | metre | |
| 103m | km | kilometre | |
| Percentage | % | % | percentage |
| Temperature | K | K | degree Kelvin |
| C | C | degree Celsius | |
| Angle | ° | deg | degree |
| rad | rad | radian | |
| Solid Angle | sr | sr | steradian |
| Pressure | hPa | hPa | hectoPascal |
| Ozone | kg.m-2 | kg.m-2 | kilogram per square metre |
| Dimensionless quantities | nc | nc | numerical counts |
| dl | dl | dimensionless | |
| Multiple dimension quantities | md | md | table constituted with different physical parameters having different units |