The ocean quality and science flags are provided by a specific annotations file named wqsf.nc.
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 by Auxiliary Data Files (ADFs).
Flag Name | Water Classification, Quality and Science Flags Flag Description |
Classification and Quality Flags | |
INVALID | Invalid flag: instrument data missing or invalid |
WATER | Clear sky water |
LAND | Clear sky land |
CLOUD | Cloudy pixel |
CLOUD_AMBIGUOUS | Potentially cloudy pixels |
CLOUD_MARGIN | A margin around CLOUD and CLOUD_AMBIGUOUS of 2 pixels in RR and 4 pixels in FR products |
SNOW_ICE | Possible sea-ice or snow contamination |
INLAND_WATER | Fresh inland waters flag: based on Level-1 land_water flag |
TIDAL | Pixel is in shallow water: based on Level-1 land_water flag |
COSMETIC | Cosmetic flag (from Level-1B): missing data filled in by interpolation |
SUSPECT | Suspect flag (from Level-1B): transmission errors means measurements may be unreliable |
HISOLZEN | High solar zenith: ?s > 70° |
SATURATED | Saturation flag: saturated within any band from 400 to 754 nm or in bands 779, 865, 885 and 1020 nm |
MEGLINT | Flag for pixels corrected for glint (see ATBD SD-03-C09 for details) |
RISKGLINT | Flag for pixels for which the glint correction is not reliable (see ATBD SD-03-C09 for details) |
WHITECAPS | Whitecaps flag: see ATBD SD-03-C06 for details |
ADJAC | Meaningless - reserved for future use |
WVFAIL | The water vapour retrieval algorithm failed |
PAR_FAIL | PAR calculation failed. Internal flag is OC_PAR_FAIL |
ACFAIL | Atmospheric correction is suspect |
OC4ME_FAIL | OC4Me algorithm failed |
OCNN_FAIL | IMT NN algorithm failed |
KDM_ FAIL | KDM07 algorithm failed |
KDL_ FAIL | KDL05 algorithm failed |
Science Flags | |
BPAC_ON | BWAC was switched on and attempted: see ATBD SD-03-C08 for details |
WHITE_SCATT | "White" scatterer flag within the water: see ATBD SD-03-C08 for details |
LOWRW | (p'w(b, j, f) < R560MIN) or HIINLD_F raised |
HIGHRW | High RW at 560nm or CASE2_F raised |
ANNOT | Annotation flag for the quality of the atmospheric correction (see OLCI DPM) |
RWNEG | Provides a "negative water-leaving reflectance" flag for each water-leaving reflectance ban |