read_cryosat_L2I.py

• Reads Level-2 Intermediate CryoSat data into a python environment.
• Level-2I data for Baselines A, B and C come as packed Payload Data System (PDS) files.
• Level-2I data for Baseline D comes as netCDF4 files.
• Supported CryoSat Modes: LRM, SAR, SARin, FDM, SID, GDR

Calling Sequence

import cryosat_toolkit.read_cryosat_L2I as read_cryosat_L2I
CS_L2I_mds = read_cryosat_L2I(full_filename)

Source code

Arguments

• full_filename: full path of CryoSat .DBL or .nc file

Keyword arguments

• CS_L2I_mds: Python dictionary with groups:
  • 'Location': Time and Orbit Parameters
  • 'Geometry': Elevation Corrections and Flags
  • 'Data': Geolocation and Elevation Measurements with Quality Parameters
  • 'Auxiliary': Auxiliary Data for Elevation Processing
  • 'Instrumental': Intrument Corrections
  • 'METADATA': Header data
    • 'MPH': Main Product Headers
    • 'SPH': Specific Product Headers
    • 'DSD': Data Set Descriptors

Level-2 Intermediate File Convention

The file names use the following convention: MM_CCCC_XXXXXXXXXX_yyyymmdd_hhmmss_YYYYMMDD_HHMMSS__bvvv.ttt

• MM is the Mission ID (CS for CryoSat-2)
• CCCC is the file class (see File Class table)
• XXXXXXXXXX is the file type (see File Type table)
• yyyymmdd_hhmmss is the start date and time in UTC
• YYYYMMDD_HHMMSS is the stop date and time in UTC
• b is the baseline identifier
• vvv is the version number of the file
• ttt is the extension
  • HDR: header file
  • DBL: binary data file
  • nc: netCDF data file

File Class	Description
OFFL	Off Line Processing/Systematic
NRT_	Near Real Time
RPRO	Reprocessing
TEST	Testing
LTA_	Long Term Archive

File Type	Description
SIR_LRMI2_	Intermediate L2 Product from LRM Processing
SIR_SINI2_	Intermediate L2 Product from SIN Processing
SIR_SIDI2_	Intermediate L2 Product from SIN Degraded Process
SIR_SARI2A	Intermediate L2 Product from SAR Step 1 Processing
SIR_SARI2B	Intermediate L2 Product from SAR Step 2 Processing