Mitrofanov I G, Nikiforov S Y, Djachkova M V, Lisov D I, Litvak M L, Sanin A B, Vasavada A R
Space Research Institute of the Russian Academy of Sciences (IKI) Moscow Russia.
Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA.
J Geophys Res Planets. 2022 Nov;127(11):e2022JE007327. doi: 10.1029/2022JE007327. Epub 2022 Nov 22.
This paper presents estimates of the water and chlorine contents in the subsurface of Gale crater based on the measurements by the Dynamic Albedo of Neutrons (DAN) instrument onboard the NASA Curiosity rover. It is Part 1 of a two-paper series. Data derived both from DAN active and passive measurements are presented in discrete surface areas (pixels) assuming a homogeneous distribution of water within the DAN sensing depth (60 cm) along the traverse of the rover. It is shown that the content of hydrogen, reported as Water Equivalent Hydrogen, varies between almost zero and a maximum of (6.1 ± 0.7) wt.%. The content of absorption equivalent chlorine varies between almost zero and (2.6 ± 0.2) wt.%. Such variations are thought to be related to the different geological processes and environmental conditions present in the strata along the traverse during the evolutionary history of Gale crater. The second paper (Part 2) studies particular properties of water and abundances of neutron absorbing elements at distinct geological regions, that the rover crossed on its way.
本文基于美国国家航空航天局（NASA）好奇号火星车搭载的中子动态反照率（DAN）仪器的测量结果，给出了盖尔陨石坑地下的水和氯含量估计值。这是一个两篇论文系列的第1部分。假设在火星车行进路线上，DAN探测深度（60厘米）内水呈均匀分布，从DAN主动和被动测量中得出的数据以离散的表面区域（像素）呈现。结果表明，以等效水氢表示的氢含量在几乎为零到最大值（6.1±0.7）重量百分比之间变化。吸收等效氯的含量在几乎为零到（2.6±0.2）重量百分比之间变化。这种变化被认为与盖尔陨石坑演化历史中，火星车行进路线上各岩层中存在的不同地质过程和环境条件有关。第二篇论文（第2部分）研究了火星车途中经过的不同地质区域的水的特殊性质和中子吸收元素的丰度。
