#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2022 Satpy developers
#
# This file is part of satpy.
#
# satpy 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.
#
# satpy is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# satpy. If not, see <http://www.gnu.org/licenses/>.
"""Advanced Geostationary Radiation Imager reader for the Level_1 HDF format.
The files read by this reader are described in the official Real Time Data Service:
http://fy4.nsmc.org.cn/data/en/data/realtime.html
"""
import logging
from satpy.readers.fy4_base import FY4Base
logger = logging.getLogger(__name__)
[docs]class HDF_AGRI_L1(FY4Base):
"""AGRI l1 file handler."""
def __init__(self, filename, filename_info, filetype_info):
"""Init filehandler."""
super(HDF_AGRI_L1, self).__init__(filename, filename_info, filetype_info)
self.sensor = 'AGRI'
[docs] def get_dataset(self, dataset_id, ds_info):
"""Load a dataset."""
ds_name = dataset_id['name']
logger.debug('Reading in get_dataset %s.', ds_name)
file_key = ds_info.get('file_key', ds_name)
if self.PLATFORM_ID == 'FY-4B':
if self.CHANS_ID in file_key:
file_key = f'Data/{file_key}'
elif self.SUN_ID in file_key or self.SAT_ID in file_key:
file_key = f'Navigation/{file_key}'
data = self.get(file_key)
if data.ndim >= 2:
data = data.rename({data.dims[-2]: 'y', data.dims[-1]: 'x'})
data = self.calibrate(data, ds_info, ds_name, file_key)
self.adjust_attrs(data, ds_info)
return data
[docs] def adjust_attrs(self, data, ds_info):
"""Adjust the attrs of the data."""
satname = self.PLATFORM_NAMES.get(self['/attr/Satellite Name'], self['/attr/Satellite Name'])
data.attrs.update({'platform_name': satname,
'sensor': self['/attr/Sensor Identification Code'].lower(),
'orbital_parameters': {
'satellite_nominal_latitude': self['/attr/NOMCenterLat'].item(),
'satellite_nominal_longitude': self['/attr/NOMCenterLon'].item(),
'satellite_nominal_altitude': self['/attr/NOMSatHeight'].item()}})
data.attrs.update(ds_info)
# remove attributes that could be confusing later
data.attrs.pop('FillValue', None)
data.attrs.pop('Intercept', None)
data.attrs.pop('Slope', None)