🔸ALOS-2 PALSAR-2#

FBD L1.1 (alos2_fbd_l11)#

The alos2_fbd_l11 function extracts C2 matrix elements from the given ALOS-2 FBD mode folder and saves them into a C2 directory.

polsartools.alos2_fbd_l11(inFolder, azlks=3, rglks=2, calfac_dB=-83)[source]

Extracts the C2 matrix elements (C11, C22, and C12) from ALOS-2 Fine Beam Dual-Pol (FBD) CEOS data and saves them into respective binary files.

Example:#

>>> alos2_fbd_l11("path_to_folder", azlks=5, rglks=3, calfac_dB=-80)
This will extract the C2 matrix elements from the ALOS-2 Fine Beam Dual-Pol data
in the specified folder and save them in the 'C2' directory.

Parameters:#

inFolderstr

The path to the folder containing the ALOS-2 Fine Beam Dual-Pol CEOS data files.

azlksint, optional (default=3)

The number of azimuth looks for multi-looking.

rglksint, optional (default=2)

The number of range looks for multi-looking.

calfac_dBfloat, optional (default=-83)

The calibration factor in dB used to scale the raw radar data. It is applied to the HH and HV polarization data before matrix computation.

Returns:#

None

The function does not return any value. Instead, it creates a folder named C2 (if not already present) and saves the following binary files:

  • C11.bin: Contains the C11 matrix elements.

  • C22.bin: Contains the C22 matrix elements.

  • C12_real.bin: Contains the real part of the C12 matrix.

  • C12_imag.bin: Contains the imaginary part of the C12 matrix.

  • config.txt: A text file containing grid dimensions and polarimetric configuration.

Raises:#

FileNotFoundError

If the required ALOS-2 data files (e.g., IMG-HH and IMG-HV) cannot be found in the specified folder.

ValueError

If the calibration factor is invalid or if the files are not in the expected format.

HBQ L1.1 (alos2_hbq_l11)#

The alos2_hbq_l11 function extracts S2/T3/C3 matrix elements from the given ALOS-2 HBQ mode folder and saves them into a corresponding directories.

polsartools.alos2_hbq_l11(inFolder, matrix='T3', azlks=8, rglks=4, sym=True, calfac_dB=-83)[source]

Extracts single look S2 or Multi-look T3/C3 matrix elements from ALOS-2 Quad-Pol (HBQ) CEOS data and saves them into respective binary files.

Example:#

>>> alos2_hbq_l11("path_to_folder", azlks=5, rglks=3, calfac_dB=-80)
This will extract the T3 matrix elements from the ALOS-2 Fine Beam Dual-Pol data
in the specified folder and save them in the 'C2' directory.

Parameters:#

inFolderstr

The path to the folder containing the ALOS-2 Quad-Pol (HBQ) CEOS data folder.

matrixstr, optional (default=’T3’)

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

azlksint, optional (default=8)

The number of azimuth looks for multi-looking.

rglksint, optional (default=4)

The number of range looks for multi-looking.

calfac_dBfloat, optional (default=-83)

The calibration factor in dB used to scale the raw radar data. It is applied to the HH and HV polarization data before matrix computation.

Returns:#

None

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