JPL DE Documentation I'm currently trying to write a C++ library that makes accessing binary data from a JPL ephemeris file easier. So far I sifted through the web, trying to find a good and thorough documentation about what is actually stored in there and how to work with the data.

Does anybody know of a PDF/Book or something similar, that explains anything of that sort?

Thanks in advance!
Be aware there are differing formats. SPK is the newer format - the older text format seems to be deprecated.

It's worth having a look at the documentation on this jplephem python library as it explains the format reasonably well. If you do use SPK, you'll need to read all of the documentation in NASA's SPK repository

I'm not sure if this is from the same author as this library - worth a read as it discusses the FITS format.