The file naming convention of SLSTR products (see Sentinel-3 PDGS File Naming Convention for more details) is identified by the sequence of fields described below:

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

where:

• MMM is the mission ID:
  • S3A = SENTINEL-3A
  • S3B = SENTINEL-3B
  • S3_ = for both SENTINEL-3A and 3B
• SL is the data source/consumer (SL = SLSTR)
• 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 SLSTR data:
    • "SLT___" = ISPs.
  • Level-1 SLSTR data:
    • "RBT___" = TOA Radiances and Brightness Temperature
    • "RBT_BW" = browse product derived from "RBT___".
  • Level-2 SLSTR data:
    • "WCT___" = 2 and 3 channels SST for nadir and along track view
    • "WST___" = L2P sea surface temperature
    • "LST___" = land surface temp
    • "FRP___" = Fire Radiative Power
    • "WST_BW" = browse product derived from "WST___"
    • "LST_BW" = browse product derived from "LST___".
• yyyymmddThhmmss is the sensing start time
• YYYYMMDDTHHMMSS is the sensing stop time
• YYYYMMDDTHHMMSS is the product creation date
• [instance ID] 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 "_", i.e.
DDDD_CCC_LLL_____
2. Instance ID for the instrument data products  
disseminated in "frames":
Duration, "_", cycle number, "_", relative orbit number, "_", frame along track coordinate, i.e.
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_SL_2_LST____20151229T095534_20151229T114422_20160102T150019_6528_064_365______LN2_D_NT_001.SEN3