Khan's forces didn't only focus on repairing his ship and amassing supplies for the labor. Some teams had worked on rearranging and sorting out anything they had gathered after the two alien scouts' appearance, which wasn't small.
Of course, the outpost didn't have the best scanners, and they couldn't gather much since the two aliens quickly chased after Khan.
Khan had also fried his ship's scanners before the violent landing, rendering them unable to record the battle. However, the chase had featured a third party that had never stopped following him.
Wayne's ship didn't have the same limitations as Khan's vessel, and he had flown after Khan throughout the chase. Wayne didn't overclock his engines, making him miss a piece of the battle, but his scanners did capture its final phases.