Hashimoto et al. Figure 1. Mission sequence of OMOTENASHI. Table 2. Operational time schedule Day 1 Deployment from SLS rocket: SEP About 4 h after launch Spacecraft activation SEP þ 1 min Sun-pointing attitude acquisition SEP þ 10 min Health check and orbit determination A few hours per station Day 2 Orbit control to lunar impact orbit by gas jet thrusters (DV1) 15 to 20 m/s, 60 min Health check and orbit determination A few hours per station Day 3 Orbit correction by gas jet thrusters if needed (TCM) Less than 5 m/s Health check and orbit determination A few hours per station Day 4 to 5 (depends on SLS trajectory) Health check and orbit determination A few hours per station The final day Timing is TBD Attitude maneuver to DV2 attitude IMP - 25 min Spinning up to 5 Hz (TBD) IMP - 15 min Release Frangibolts IMP - 10 min Airbag deployment IMP - 7 min SP is powered on IMP - 5 min Release Pinpuller, ignition of RM, and OM separation IMP - 1 min, Deceleration by RM (DV2) 2500 m/s, 17 s Semi-hard landing: IMP IMP þ 5 min or 120 min Surface operation of SP SEPTEMBER 2019 IEEE A&E SYSTEMS MAGAZINE 23