class_docstr: SEVIRI calibration algorithms.
class_docstr_tok: ["SEVIRI","calibration","algorithms","."]
docstr: Compute the L15 temperature.
docstr_tok: ["Compute","the","L15","temperature","."]
code: def _tl15(self, data, wavenumber):
      """Compute the L15 temperature."""
      return (C2 * wavenumber) / np.log(
          (1.0 / data) * C1 * wavenumber**3 + 1.0
      )
  
imports: from __future__ import annotations
  import warnings
  from datetime import datetime, timedelta
  import dask.array
  import numpy
  import pyproj
  from numpy.polynomial.chebyshev import Chebyshev
  from satpy.readers.eum_base import issue_revision, time_cds_short
  from satpy.readers.utils import apply_earthsun_distance_correction
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 6 for calling the SEVIRICalibrationAlgorithm obj's underlying member method code with example usage: obj._tl15(data, wavenumber) and returns: unknown