class_docstr: Polynomial encoding the satellite position.
  
  Satellite position as a function of time is encoded in the coefficients
  of an 8th-order Chebyshev polynomial.
class_docstr_tok: ["Polynomial","encoding","the","satellite","position",".","Satellite","position","as","a","function","of","time","is","encoded","in","the","coefficients","of","an","8th-order","Chebyshev","polynomial","."]
docstr: Initialize the polynomial.
docstr_tok: ["Initialize","the","polynomial","."]
code: def __init__(self, coefs, start_time, end_time):
      """Initialize the polynomial."""
      self.coefs = coefs
      self.start_time = start_time
      self.end_time = end_time
  
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 1 to create a new OrbitPolynomial object  with example: obj = OrbitPolynomial(coefs, start_time, end_time)