The table below summarises the geophysical units that are used in the SYN products.
Descriptive Name | Variable ID | Units | |
GLOBAL | S3 L1 TOA Radiance and Brightness Temperature | mW m-2sr-1nm-1M, W m-2sr-1µm-1 | |
DEM-corrected geolocation (longitude, latitude, altitude) | deg, deg, m | ||
Time stamps | µs | ||
Solar and satellite angles | deg | ||
Atmospheric and meteorological data | various | ||
LAND | SYN Surface Directional Reflectance | SDR_i | dimensionless |
SYN Aerosol Optical Thickness | T550 | dimensionless | |
SYN Aerosol Angstrom Exponent | A550 | dimensionless | |
SYN Aerosol Model Index Number | AMIN | dimensionless | |
VGP TOA Reflectance | B0, B2, B3, MIR | dimensionless | |
VGK Surface Directional Reflectance | B0, B2, B3, MIR | dimensionless | |
VGK NDVI | NDVI | dimensionless | |
S1 Surface Directional Reflectance | B0, B2, B3, MIR | dimensionless | |
S10 Surface Directional Reflectance | B0, B2, B3, MIR | dimensionless | |
S1 NDVI | NDVI | dimensionless | |
S10 NDVI | NDVI | dimensionless | |
Colour-coded NDVI Mosaic | NDVICC | dimensionless | |
Colour-coded NDSI Mosaic | NDSICC | 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-2M | kg.m-2M | 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 |