def _get_calib_coefs(self, channel_name):
"""Get coefficients for calibration from counts to radiance."""
band_idx = self.mda['spectral_channel_id'] - 1
coefs_nominal = self.prologue["RadiometricProcessing"][
"Level15ImageCalibration"]
coefs_gsics = self.prologue["RadiometricProcessing"]['MPEFCalFeedback']
radiance_types = self.prologue['ImageDescription'][
'Level15ImageProduction']['PlannedChanProcessing']
return create_coef_dict(
coefs_nominal=(coefs_nominal['CalSlope'][band_idx],
coefs_nominal['CalOffset'][band_idx]),
coefs_gsics=(coefs_gsics['GSICSCalCoeff'][band_idx],
coefs_gsics['GSICSOffsetCount'][band_idx]),
ext_coefs=self.ext_calib_coefs.get(channel_name, {}),
radiance_type=radiance_types[band_idx])
def _get_calib_coefs(self, channel_name):
"""Get coefficients for calibration from counts to radiance."""
# even though all the channels may not be present in the file,
# the header does have calibration coefficients for all the channels
# hence, this channel index needs to refer to full channel list
band_idx = list(CHANNEL_NAMES.values()).index(channel_name)
coefs_nominal = self.header['15_DATA_HEADER']['RadiometricProcessing'][
'Level15ImageCalibration']
coefs_gsics = self.header['15_DATA_HEADER']['RadiometricProcessing'][
'MPEFCalFeedback']
radiance_types = self.header['15_DATA_HEADER']['ImageDescription'][
'Level15ImageProduction']['PlannedChanProcessing']
return create_coef_dict(
coefs_nominal=(coefs_nominal['CalSlope'][band_idx],
coefs_nominal['CalOffset'][band_idx]),
coefs_gsics=(coefs_gsics['GSICSCalCoeff'][band_idx],
coefs_gsics['GSICSOffsetCount'][band_idx]),
ext_coefs=self.ext_calib_coefs.get(channel_name, {}),
radiance_type=radiance_types[band_idx])