... This training module is intended to suplement the moving target processing procedures by helping a Program Coordinator become familiar with the Moving Object Support System (MOSS). ... The MOSS subsystem consists a program called Percy and a set of ephemeris data for all planets and moons in the solar system. ... Next, it would be good to read the remainder of the Percy User's Guide except for the commands section. ... About Constraints . ... Now, run MOSS on all the targets of the test program. ...