CDM Absorption Coefficient
The CDM absorption coefficient is the main variable included in the iop_nn.nc file providing the inherent optical properties of water.
The following table provides the main characteristics of this variable including coverage, parameter ID, time latency, sampling and bands used in the associated product. The ancillary and auxiliary data provides the variables used during processing and are provided in Auxiliary Data Files (ADFs).
| PRODUCT NAME | Coloured Dissolved Matter Absorption |
| PARAMETER ID | ADG443_NN, where 443 represents the band wavelength in nm, and _NN refers to the originating algorithm. |
| PRODUCT LEVEL | 2 |
| DESCRIPTION | Absorption of coloured detrital and dissolved material, and associated error estimates, at 443 nm. |
| PRODUCT PARAMETERS | |
| COVERAGE | global |
| PACKAGING | half-orbit |
| LATENCY | NRT, NTC |
| UNITS | m-1 |
| RANGE | |
| SAMPLING | Spatial approximately 300 m x 300 m (FR) and 1.2 km x 1.2 km (RR); spectral: 1 channel. |
| FORMAT | 1-byte integer |
| APPENDED DATA | Error estimate (1-byte integer) |
| FREQUENCY | 1 product per orbit |
| SIZE OF PRODUCT | Approx. 0.54 GB (FR), 35 MB (RR) |
| ADDITIONAL INFORMATION | |
| INPUT BANDS | Oa1 (400 nm) - Oa12 (753.5 nm), Oa16 (778.75 nm), Oa17 (865 nm), Oa21 (1020 nm) |
| ANCILLARY AND AUXILIARY DATA | Neural net coefficients LUT |