satmo.preprocessors module

satmo.preprocessors.bz2_compress(source, destination, compresslevel=3, overwrite=False)

Unpacks data compressed with bz2

Utility function to bz2 compress data

Parameters:

• source (str) – the filename to compress
• destination (str) – the destination directory, filename will be set automatically
• compresslevel (int) – Compression level
• overwrite (bool) – If false, check whether file already exists and returns its name

Returns:

The filename of the bz2 compressed file

Return type:

str

satmo.preprocessors.bz2_unpack(source, destination, overwrite=False)

Unpacks data compressed with bz2

Utility function to unpack bz2 compressed data The function only works if a single file is compressed

Parameters:

• source (str) – the filename of the archive
• destination (str) – the destination directory, filename will be set automatically
• overwrite (bool) – If false, check whether file already exists and returns its name

Returns:

The filename of the unpacked file

Return type:

str

satmo.preprocessors.getanc(x)

Wrapper for the getanc.py seadas utility

Parameters:x (str) – filename of a L1 file Returns:The path to the generated (and moved) .anc text file Return type:str

satmo.preprocessors.l2gen(x, var_list, suite, data_root, get_anc=True)

Wrapper to run seadas l2gen on L1A data

Run l2gen for modis and viirs data. All intermediary files are automatically generated in the case of MODIS; if input is a viirs L1A file, there must be a corresponding GEO file in the same folder.

Parameters:

• x (str) – Path to input L1A file
• var_list (list) – List of strings representing the variables to process
• suite (str) – Output L2 suite name
• data_root (str) – Root of the local data archive
• get_anc (bool) – Download ancillary data for improved atmospheric correction. Defaults to True.

Returns:

file name of the generated L2 file

Return type:

str