1. referred to as the Solar System Data Processing System (SSDPS) . Observational data are collected and processed in a differential least-squares program to improve the i n i t i a l conditions of the planets a t a given reference epoch. Starting from these improved i n i t i a l conditions, the equations motion are numerically integrated to produce of
2. TCMl 1 + 10 TCM2 BPM I + 235 TCM3 BPM + 30 TCM4 J - 200 TCM5 J - 165 TCM6 ODM J - 147 TCM7 ODM + 47 TCM8 J - lo TCM9 5 - 3 TCMlO JOI J + 2h