Warning

The following message will be deprecated (2012-10-20). The SPICE issues are slightly chaotic due to the quick works during the proposal period, so that re-organization and refactoring should be made. Refer to Using SPICE for JUICE and Jupiter sysmtem.

PEP dedicated SPICE information (Deprecated 121022)

Data file (kernel file) should be downloaded manually, and saved into any local disk. One can specify the location of the file manually calling spice.furnsh. They are not in the git repository because some of them are too big to save into repository.

Kernel locations

The data comes from ftp://naif.jpl.nasa.gov/pub/naif/generic_kernels otherwise mentioned.

lsk

LSK of naif0009.tls is needed.

spk

SPK of de421.bsp may be needed for Jupiter relative to the Sun and the Earth.

SPK of jup230l.bsp may be needed for Jovian moons relative to the Jupiter.

pck

PCK of pck00010.tpc may be needed.

For axis transformation?? (Probably FK is also needed but will see.)

Private kernel

In addition to the above kernels, private spice kernel is added. So far, I made JSE frame definition (as same definition as GSE) in spice/jse_111130.tf.

This kernel is, under the version of v0.1beta on 111130, automatically added without specifying in the pyanarc setting file by pyana.pep.pep_spice.get_default_pepspice(). In the future, official definition of JSE frame (or equivalent) will be provided from mission team. In such a case, we should remove this functionality from the module.

More sophisticated way

Using pyana.pep.pep_spice module, you may load all the needed kernels from .pyanarc file. Refer to the module description pyana.pep.pep_spice.