The study looked at different ways to measure distances for the Korea Pathfinder Lunar Orbiter (KPLO) mission. They compared two techniques, pseudo-noise (PN) ranging and sequential ranging, to see which one worked better. They found that PN ranging was more accurate and efficient in the signal-to-noise ratio KPLO will experience. The researchers also discovered that increasing the clock frequency of the ranging system wasn't necessary for accuracy. Overall, they recommend using the T2B code for the KPLO mission.