satpy.readers.mersi_l1b module
Reader for the FY-3D MERSI-2 L1B file format.
The files for this reader are HDF5 and come in four varieties; band data and geolocation data, both at 250m and 1000m resolution.
This reader was tested on FY-3D MERSI-2 data, but should work on future platforms as well assuming no file format changes.
- class satpy.readers.mersi_l1b.MERSIL1B(filename, filename_info, filetype_info)[source]
Bases:
HDF5FileHandler
MERSI-2/MERSI-LL/MERSI-RM L1B file reader.
Initialize file handler.
- _get_bt_dataset(data, calibration_index, wave_number)[source]
Get the dataset as brightness temperature.
Apparently we don’t use these calibration factors for Rad -> BT:
coeffs = self._get_coefficients(ds_info['calibration_key'], calibration_index) # coefficients are per-scan, we need to repeat the values for a # clean alignment coeffs = np.repeat(coeffs, data.shape[0] // coeffs.shape[1], axis=1) coeffs = coeffs.rename({ coeffs.dims[0]: 'coefficients', coeffs.dims[1]: 'y' }) # match data dims data = coeffs[0] + coeffs[1] * data + coeffs[2] * data**2 + coeffs[3] * data**3
- _mask_data(data, dataset_id, attrs)[source]
Mask the data using fill_value and valid_range attributes.
- property end_time
Time for final observation.
- property sensor_name
Map sensor name to Satpy ‘standard’ sensor names.
- property start_time
Time for first observation.