WE PROPOSE FOR A SERIES OF FOUR 20 KS OBSERVATIONS WITH XMM AND NUSTAR OF THE BINARY X-RAY PUSAR SMC X-1. THIS SOURCE SHOWS A LONG-PERIOD (40 60 D) SUPERORBITAL CYCLE DUE TO A WARPED PRECESSING ACCRETION DISK. THIS DISK IS HEATED BY THE PULSED HARD X-RAY BEAM FROM THE NEUTRON STAR AND OBSERVATIONS OF THIS THERMAL EMISSION CAN PROVIDE A UNIQUE PROBE OF THE INNER ACCRETION FLOW NEAR THE MAGNETOSPHERE. HOWEVER THIS REQUIRES SENSITIVITY AND TIMING RESOLUTION FULL SUPERORBITAL CYCLE. WE WILL TAKE ADVANTAGE OF XMM S EXCELLENT SENSITIVITY AND TIME RESOLUTION ALONG WITH NUSTAR S EXQUISITE HIGH-ENERGY COVERAGE TO YIELD THE CLEAREST PICTURE TO DATE OF THE INNER ACCRETION FLOW.