Minimize Naming Convention

The file naming convention for OLCI products (see this document for more details) is identified by the sequence of fields described here:

MMM_OL_L_TTTTTT_yyyymmddThhmmss_YYYYMMDDTHHMMSS_YYYYMMDDTHHMMSS_[instance ID]_GGG_[class ID].SEN3

  • MMM is the mission ID:
    • S3A = SENTINEL-3A
    • S3B = SENTINEL-3B
    • S3_ = for both SENTINEL-3A and 3B
  • OL is the data source/consumer (OL = OLCI)
  • L is the processing level
    • "0" for Level-0
    • "1" for Level-1
    • "2" for Level-2
    • underscore "_" if processing level is not applicable.
  • TTTTTT is the Data Type ID
    • Level-0 OLCI data:
      • "EFR___" = full resolution ISPs
      • "CR1___" = calibration with spectral relaxation
      • "CR0___" = calibration with no spectral relaxation.
    • Level-1 OLCI data:
      • "EFR___" = TOA radiances at full resolution
      • "ERR___" = TOA radiances at reduced resolution
      • "RAC___" = dark offset and gain coefficients from radiometric calibration
      • "SPC___" = wavelength characterisation from spectral calibration
      • "INS_AX" = instrument characterisation auxiliary data
      • "EFR_BW" = browse product derived from "EFR___"
      • "ERR_BW" = browse product derived from "ERR___".
    • Level-2 OLCI data:
      • "WFR___" = full resolution ocean colour, water and atmosphere parameters
      • "WRR___" = reduced resolution ocean colour, water and atmosphere parameters
      • "LFR___" = full resolution land colour and atmosphere parameters
      • "LRR___" = reduced resolution land colour and atmosphere parameters
      • "ATP_AX" = atmosphere parameters auxiliary data
      • "AER_AX" = aerosol climatology auxiliary data
      • "LAP_AX" = land aerosol parameter auxiliary data
      • "LVI_AX" = land vegetation index auxiliary data
      • "WFR_BW" = browse product derived from "WFR___"
      • "WRR_BW" = browse product derived from "WRR___"
      • "LFR_BW" = browse product derived from "LFR___"
      • "LRR_BW" = browse product derived from "LRR___".
  • yyyymmddThhmmss is the sensing start time
  • YYYYMMDDTHHMMSS is the sensing stop time
  • YYYYMMDDTHHMMSS is the product creation date
  • [instance ID] The field consists of 17 characters, either uppercase letters or digits or underscores "_".

The instance id fields include the following cases, applicable as indicated:

1. Instance ID for the instrument data products disseminated in "stripes":

Duration,"_", cycle number, "_", relative orbit number,"_", 4 underscores "_"
DDDD_CCC_LLL_____
2. Instance ID for the instrument data products  
disseminated in "frames":
Duration, "_", cycle number, "_", relative orbit number, "_", frame along track coordinate
DDDD_CCC_LLL_FFFF
3. Instance ID for the instrument data products disseminated in "tiles".
Two sub-cases are applicable:
a) tile covering the whole globe:
      "GLOBAL___________"
b) tile cut according to specific
geographical criteria:
Tile Identifier
ttttttttttttttttt
4. Instance ID for auxiliary data:
            17 underscores "_" 

  • GGG identifies the centre which generated the file
  • [class ID] identifies the class ID for instrument data products with conventional sequence "P_XX_NNN" where:
    • P indicates the platform (O for operational, F for reference, D for development, R for reprocessing)
    • XX indicates the timeliness of the processing workflow (NR for NRT, ST for STC, NT for NTC)
    • NNN indicates the baseline collection or data usage.
  • .SEN3 is the filename extension.

Example of filename:

S3A_OL_1_EFR____20151102T094537_20151102T094837_20151103T075458_0180_090_022______LN2_D_NT_001.SEN3