def kernels(self):
if not hasattr(self, '_kernels'):
if 'kernels' in self._props.keys():
try:
self._kernels = util.get_kernels_from_isis_pvl(
self._props['kernels'])
except Exception as e:
self._kernels = self._props['kernels']
else:
if not ale.spice_root:
raise EnvironmentError(
f'ale.spice_root is not set, cannot search for metakernels. ale.spice_root = "{ale.spice_root}"'
)
search_results = util.get_metakernels(
ale.spice_root,
missions=self.short_mission_name,
years=self.utc_start_time.year,
versions='latest')
if search_results['count'] == 0:
raise ValueError(
f'Failed to find metakernels. mission: {self.short_mission_name}, year:{self.utc_start_time.year}, versions="latest" spice root = "{ale.spice_root}"'
)
self._kernels = [search_results['data'][0]['path']]
return self._kernels
def kernels(self):
"""
Get the NAIF SPICE Kernels to furnish
There are two ways to specify which kernels a driver will use:
1. Passing the 'kernels' property into load(s) or at instantiation.
This can be either a straight iterable or a dictionary that specifies
the kernels in ISIS style ('TargetPosition', 'InstrumentPosition', etc).
2. Set the ALESPICEROOT environment variable. This variable should be
the path to a directory that contains directories whose naming
convention matches the PDS Kernel Archives format,
`shortMissionName-versionInfo`. The directory corresponding to the
driver's mission will be searched for the approriate meta kernel to
load.
See Also
--------
ale.util.get_kernels_from_isis_pvl : Function used to parse ISIS style dict
ale.util.get_metakernels : Function that searches ALESPICEROOT for meta kernels
ale.util.generate_kernels_from_cube : Helper function to get an ISIS style dict
from an ISIS cube that has been through
spiceinit
"""
if not hasattr(self, '_kernels'):
if 'kernels' in self._props.keys():
try:
self._kernels = util.get_kernels_from_isis_pvl(
self._props['kernels'])
except Exception as e:
self._kernels = self._props['kernels']
else:
if not ale.spice_root:
raise EnvironmentError(
f'ale.spice_root is not set, cannot search for metakernels. ale.spice_root = "{ale.spice_root}"'
)
search_results = util.get_metakernels(
ale.spice_root,
missions=self.short_mission_name,
years=self.utc_start_time.year,
versions='latest')
if search_results['count'] == 0:
raise ValueError(
f'Failed to find metakernels. mission: {self.short_mission_name}, year:{self.utc_start_time.year}, versions="latest" spice root = "{ale.spice_root}"'
)
self._kernels = [search_results['data'][0]['path']]
return self._kernels