SPK kernel files contain high precision state/position information for spacecraft, planets, etc.
One example SPK kernel that may be of use to those getting started is:
| File | Purpose | |
|---|---|---|
de430.bsp |
Planetary Ephemerides | link |
The term Ephemeris means a set of data that describes an object’s position over time, and Ephemerides is the plural form.
More information can be found by downloading the SPICE SPK Tutorial:
https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/Tutorials/pdf/individual_docs/18_spk.pdf
