Lunar Radiation Characteristics and Soil properties Reversal in the Rümker Region
In a groundbreaking development, researchers have made significant strides in China's lunar exploration project. The project, comprising three steps - orbiting, landing, and returning - is progressing with the landing region of the CE-5 lunar probe being the Rümker region, a location in the northern Oceanus Procellarum on the lunar near side.
The study, funded by the National Natural Science Foundation of China (Grant No. 41771405), focuses on the microwave radiation properties and the inversion of lunar regolith parameters in the Rümker region. The research has been published in the journal Acta Astronomica Sinica and can be found at this link.
The research team introduced the normalized coefficient of diurnal TB to reduce the effect of diurnal physical temperature on TB and highlight lunar regolith features. This coefficient can play a role in verifying the inversion results of lunar regolith parameters.
Most areas in the study have a uniform regolith thickness that does not exceed 4m. However, the northwest region of the study area has the largest regolith thickness, exceeding 6m. Interestingly, the Rümker E region shows the shallowest regolith thickness due to the impact effect.
The study area includes notable landmarks such as Mons Rümker, Naumann, Naumann B, Rümker E, and Rümker F. Of particular interest is Mons Rümker, a huge and towering shield volcano that rises about 1000 m above the surrounding area. The Rümker region has a long volcanic history and complex geological composition.
To gather data for this research, the researchers used CELMS, the first passive microwave radiometer in the world to sound the lunar surface, operating at four frequencies. CE-5, a sample return satellite of China, is expected to drill at a depth of no less than 2 m and bring back about 2 kg of scientific samples. The third step, "return", will be achieved by the CE-5.
The research has important scientific significance for the depth mining and application of CELMS data. The normalized coefficient can show the temperature difference between day and night and represent the dielectric characteristics and thickness of regolith to some extent. This study provides further support for selecting sampling sites of CE-5 based on the thickness distribution of regolith.
Despite the advancements made, it is worth noting that no specific researcher or team from the Chinese Academy of Sciences (CAS) who has investigated the microwave radiation properties and the inversion of lunar regolith parameters in the Rümker region is identified in the provided search results, and no further information is available based on current public knowledge.
This research underscores the ongoing efforts and advancements in China's lunar exploration project, offering insights into the lunar regolith and paving the way for future lunar missions.
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