🔸Chandrayaan-II (DFSAR) — PolSARtools 0.8 documentation

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# 🔸Chandrayaan-II (DFSAR)

## Full-pol (`chyaan2_fp`)

The chyaan2_fp function extracts matrix elements (S2, C3 or T3) from the given Chandrayaan-II folder and saves them into respective directories (S2, C3 or T3).

polsartools.chyaan2_fp(inFolder, matrixType='T3', azlks=None, rglks=None)

  Extracts specified matrix elements (S2, T3, or C3) from Chandrayaan-II DFSAR Full-Pol data and saves them into respective directories.

  ### Example:

      >>> chyaan2_fp("path_to_folder", matrix='T3', azlks=5, rglks=3)
      This will extract the T3 matrix elements from the Chandrayaan-II DFSAR Full-Pol data
      in the specified folder and save them in the 'T3' directory.

  ### Parameters:

  inFolderstr

    The path to the folder containing the Chandrayaan-II DFSAR Full-Pol data files.

  matrixTypestr, optional (default=’T3’)

    The type of matrix to extract. Can either be ‘S2’, ‘T3’, or ‘C3’.

    - ‘S2’ will extract the S2 matrix elements.

    - ‘T3’ will extract the T3 matrix elements.

    - ‘C3’ will extract the C3 matrix elements.

  azlksint, optional (default=None)

    The number of azimuth looks for multi-looking. If not specified, the value is derived from the ground range and output line spacing.

  rglksint, optional (default=None)

    The number of range looks for multi-looking. If not specified, the value is set to 1.

  ### Returns:

  None

    The function does not return any value. Instead, it creates a folder named S2, T3, or C3 (depending on the chosen matrix) and saves the corresponding binary files.

    - For ‘S2’: - s11.bin: Contains the S11 matrix elements. - s12.bin: Contains the S12 matrix elements. - s21.bin: Contains the S21 matrix elements. - s22.bin: Contains the S22 matrix elements. - config.txt: Contains metadata including multilook parameters. - multilook_info.txt: Contains detailed information about the multilook parameters.

    - For ‘T3’: - t11.bin, t12.bin, t13.bin, t22.bin, t23.bin, t33.bin: Contain the T3 matrix elements. - config.txt: Contains metadata including multilook parameters. - multilook_info.txt: Contains detailed information about the multilook parameters.

    - For ‘C3’: - c11.bin, c12.bin, c13.bin, c22.bin, c23.bin, c33.bin: Contain the C3 matrix elements. - config.txt: Contains metadata including multilook parameters. - multilook_info.txt: Contains detailed information about the multilook parameters.

  ### Raises:

  FileNotFoundError

    If the required files for the specified matrix type cannot be found in the folder.

  ValueError

    If an invalid matrix type is provided (valid options are ‘S2’, ‘T3’, or ‘C3’).