What is the summary description for file naming and types (mission planning)?
Mission planning files are created by the GALEX science operations center in the process of scheduling science observations. All mission planning files are text or FITS files. FITS files have the same names as text files with a .fits extension added. Extension names and types for standard planning files are listed below. Files that will be ingested into the MAST Database are tagged with a * symbol. Certain classes of files (e.g. *.rec files) may be retired soon and may not exist in future internal or public release; again, those files ingested directly into the Database are tagged with *. Note addition of * and .fits in the extension names below. The pend_obs file is an addition.