SpaceX hopes the weather holds for its scheduled launch Thursday of a Thai communications satellite, and with it another successful landing of its Falcon 9 rocket at sea. Launching from Cape Canaveral, the Falcon 9 aims to deliver the Thaicom PLC’s Thaicom 8 satellite to orbit. After separating from the rocket’s upper stage, the Falcon 9 booster will dive toward an unpiloted SpaceX drone ship in the Atlantic Ocean, hoping to make it three consecutive missions with successful booster landings at sea.