code: def get_lons_lats(lines, pixels, nav_params):
      """Compute lon/lat coordinates given VISSR image coordinates.
  
      Args:
          lines: VISSR image lines
          pixels: VISSR image pixels
          nav_params: Image navigation parameters
      """
      pixels_2d, lines_2d = da.meshgrid(pixels, lines)
      lons, lats = da.map_blocks(
          _get_lons_lats_numba,
          lines_2d,
          pixels_2d,
          nav_params=_make_nav_params_numba_compatible(nav_params),
          **_get_map_blocks_kwargs(pixels_2d.chunks),
      )
      return lons, lats
  
imports: from collections import namedtuple
  import dask.array
  import numba
  import numpy
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 1 for calling a global function with example usage: get_lons_lats(lines, pixels, nav_params) and returns: lons,  lats