1. INTRODUCTION

2. OBSERVATIONAL DATA FROM HUBBLE AND SUBARU

3. ASTROMETRIC MATCHING BETWEEN ACS, HSC, AND GAIA DR2 IN THE COSMOS FIELD

5. PROPER MOTIONS OF ALL JSP SOURCES, ASTROMETRICALLY CORRECTED TO THE GAIA DR2 GRID

6. UNCERTAINTIES IN JSP PROPER MOTIONS

8. DISCUSSION

9. CONCLUSIONS