The Level-2 SYN product (SY_2_SYN), is outputted by the SYNERGY Level-2 processor and contains:
- Level-2 surface reflectance (including error estimates) for the sun-reflective SLSTR channels (S1, S2, S3, S5, S6 for both nadir and oblique view) and for all OLCI channels, except for the oxygen absorption bands Oa14 and Oa15, and the water vapour band Oa20 (see the table below).
- Level-2 aerosol optical thickness at 550 nm (including error estimates) (Syn_AOT550.nc)
- Level-2 Aerosol Angstrom Exponent Data Set (Syn_Angstrom_exp550.nc).
And Annotation Data Files:
- Level-2 aerosol model index number (AMIN).
- Classification and quality Flags associated with OLCI, SLSTR and SYNERGY products
- High resolution georeferencing data
- Time stamp annotations
- Annotations parameters associated with removed pixel
- Low resolution georeferencing data and Sun and View angles associated with OLCI products
- Low resolution georeferencing data and View angles associated with SLSTR nadir view products
- Low resolution georeferencing data and View angles associated with SLSTR oblique view products
- ECMWF meteorology data
|
SYN CHANNEL |
CENTRAL WAVELENGTH (nm) |
WIDTH (nm) |
INSTRUMENT CHANNEL |
|
SYN01 |
400 |
15 |
Oa01 |
|
SYN02 |
412.5 |
10 |
Oa02 |
|
SYN03 |
442.5 |
10 |
Oa03 |
|
SYN04 |
490 |
10 |
Oa04 |
|
SYN05 |
510 |
10 |
Oa05 |
|
SYN06 |
560 |
10 |
Oa06 |
|
SYN07 |
620 |
10 |
Oa07 |
|
SYN08 |
665 |
10 |
Oa08 |
|
SYN09 |
673.75 |
7.5 |
Oa09 |
|
SYN10 |
681.25 |
7.5 |
Oa10 |
|
SYN11 |
708.75 |
10 |
Oa11 |
|
SYN12 |
753.75 |
7.5 |
Oa12 |
|
SYN13 |
778.75 |
15 |
Oa16 |
|
SYN14 |
865 |
20 |
Oa17 |
|
SYN15 |
885 |
10 |
Oa18 |
|
SYN16 |
1 020 |
40 |
Oa21 |
|
SYN17 |
555 |
20 |
S1 (nadir view) |
|
SYN18 |
659 |
20 |
S2 (nadir view) |
|
SYN19 |
865 |
20 |
S3 (nadir view) |
|
SYN20 |
1 610 |
60 |
S5 (nadir view) |
|
SYN21 |
2 250 |
50 |
S6 (nadir view) |
|
SYN22 |
555 |
20 |
S1 (oblique view) |
|
SYN23 |
659 |
20 |
S2 (oblique view) |
|
SYN24 |
865 |
20 |
S3 (oblique view) |
|
SYN25 |
1 610 |
60 |
S5 (oblique view) |
|
SYN26 |
2 250 |
50 |
S6 (oblique view) |
| FLAG MASK |
FLAG MEANING |
DESCRIPTION |
|
20 |
SYN_cloud |
Identifies clouds |
|
21 |
SYN_snow_risk |
Foreseen for indicating areas with or without snow/ice that are not clouds, but present features similar to clouds |
|
22 |
SYN_SDR_OOR |
Indicates that at least one SDR is out of range (<0 or >1) |
|
23 |
SYN_AOT_climato |
Indicates that AOT is filled with the climatological value |
|
24 |
SYN_land |
Identifies land |
|
25 |
SYN_no_olc |
Pixel has no OLCI radiances |
|
26 |
SYN_no_sln |
Pixel has no SLSTR nadir view radiances |
|
27 |
SYN_no_slo |
Pixel has no SLSTR oblique view radiances |
|
28 |
SYN_partly_cloudy |
Averaging region contains cloudy pixels |
|
29 |
SYN_partly_water |
Averaging region contains water pixels |
|
210 |
SYN_border |
Averaging region contains fewer pixels, because pixel is at the boundary of the camera image |
|
211 |
SYN_aerosol_filled |
Aerosol optical thickness was filled |
|
212 |
SYN_success |
Aerosol retrieval was successful |
|
213 |
SYN_negative_curvature |
Aerosol retrieval failed because of negative error metric curvature |
|
214 |
SYN_too_low |
Aerosol retrieval failed because AOT was too low (AOT < 10-4) |
|
215 |
SYN_high_error |
Aerosol retrieval failed because relative error was too high (AOT > 0.1 and relative error > 500 %) |