Chang’E-7 Lunar Soil Water Molecule Analyzer (LSWMA) Prototype for High-Precision Measurement of Water Content and Hydrogen Isotope Ratio

Abstract

The developed Chang’E 7 LSWMA prototype demonstrates high precision in measuring water content and isotope values, which are the most important part of the measurement process, and the experimental results offer valuable guidance for in-situ measurement and data inversion. The LSWMA will perform the measurements after obtaining drilling (up to 1 m deep) or surface samples on the Moon. The estimated water content has also been affected by the processes of sampling, transportation and heating in addition to TDLAS. Therefore, the overall errors need to be analyzed and corrected. For isotopes measurement, the repetitions of experiments on the Moon’s PSR are limited due to power and temperature constraints. The memory effect error correction algorithm should be introduced to improve accuracy.

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China University of Geosciences (Wuhan) and Springer-Verlag GmbH Germany, Part of Springer Nature