loading_kernels.py

from spice_helpers import *

if len(get_loaded_kernels()) == 0:
  load_kernels() # loads relevant solar system kernels, which never change
  
  # Load data product kernels for NOVA-C, which change fairly frequently:
  spice.furnsh(['kernels/full_trajectory_ish.spk', # SPK = reference trajectory
                'kernels/full_trajectory_ish.ck',  #  CK = reference attitudes
                'kernels/nova-c.fk',               #  FK = frame kernels (instruments)
                'kernels/nova-c_structures.spk',   # instrument locations 
                'kernels/nova-c.tcm'])             # spacecraft clock kernel (needed for attitudes)