There are missing entries in the glossary:
1. "camera model"
3. "pixel" - We all know generally what a pixel is, but in this case we need something that talks about instrument pixels vs. isis cube pixels, etc.
4. "shape model"
In addition, the entry for "NAIF" needs additional info. For example, that it is a NASA facility, a few things about what it does and what it is used for (something more than "navigation and ancillary information"). Just a few sentences would be a big improvement.