Source code for satpy.readers.abi_l2_nc

# Copyright (c) 2019-2023 Satpy developers
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <>.
"""Advance Baseline Imager NOAA Level 2+ products reader.

The files read by this reader are described in the official PUG document:


import logging

import numpy as np

from satpy.readers.abi_base import NC_ABI_BASE

LOG = logging.getLogger(__name__)

[docs] class NC_ABI_L2(NC_ABI_BASE): """Reader class for NOAA ABI l2+ products in netCDF format."""
[docs] def get_dataset(self, key, info): """Load a dataset.""" var = info['file_key'] if self.filetype_info['file_type'] == 'abi_l2_mcmip': var += "_" + key["name"] LOG.debug('Reading in get_dataset %s.', var) variable = self[var] variable.attrs.update(key.to_dict()) self._update_data_arr_with_filename_attrs(variable) self._remove_problem_attrs(variable) return variable
[docs] def _update_data_arr_with_filename_attrs(self, variable): _units = variable.attrs['units'] if 'units' in variable.attrs else None variable.attrs.update({ 'platform_name': self.platform_name, 'sensor': self.sensor, 'units': _units, 'orbital_parameters': { 'satellite_nominal_latitude': float(['nominal_satellite_subpoint_lat']), 'satellite_nominal_longitude': float(['nominal_satellite_subpoint_lon']), 'satellite_nominal_altitude': float(['nominal_satellite_height']) * 1000., }, }) if 'flag_meanings' in variable.attrs: variable.attrs['flag_meanings'] = variable.attrs['flag_meanings'].split(' ') # add in information from the filename that may be useful to the user for attr in ('scene_abbr', 'scan_mode', 'platform_shortname'): variable.attrs[attr] = self.filename_info.get(attr) # add in information hardcoded in the filetype YAML for attr in ('observation_type',): if attr in self.filetype_info: variable.attrs[attr] = self.filetype_info[attr] # copy global attributes to metadata for attr in ('scene_id', 'orbital_slot', 'instrument_ID', 'production_site', 'timeline_ID'): variable.attrs[attr] =
[docs] @staticmethod def _remove_problem_attrs(variable): # remove attributes that could be confusing later if not np.issubdtype(variable.dtype, np.integer): # integer fields keep the _FillValue variable.attrs.pop('_FillValue', None) variable.attrs.pop('scale_factor', None) variable.attrs.pop('add_offset', None) variable.attrs.pop('valid_range', None) variable.attrs.pop('_Unsigned', None) variable.attrs.pop('valid_range', None) variable.attrs.pop('ancillary_variables', None) # Can't currently load DQF
[docs] def available_datasets(self, configured_datasets=None): """Add resolution to configured datasets.""" for is_avail, ds_info in (configured_datasets or []): # some other file handler knows how to load this # don't override what they've done if is_avail is not None: yield is_avail, ds_info matches = self.file_type_matches(ds_info['file_type']) if matches: # we have this dataset resolution = self.spatial_resolution_to_number() new_info = ds_info.copy() new_info.setdefault('resolution', resolution) yield True, ds_info elif is_avail is None: # we don't know what to do with this # see if another future file handler does yield is_avail, ds_info