The Meridian Project’s sounding rocket mission uses a mass spectrometer to conduct in-situ atmospheric detection. In order to assess the influence of surface material outgassing and the attitude control jet on the spectrometer’s detection, a sounding rocket platform was modeled and simulated. Using the physical field simulation software COMSOL and the Monte Carlo method, this study investigated whether the gas molecules from the two cases could enter the in-situ atmospheric mass spectrometer’s sensor sampling port after colliding with the background atmosphere. The simulation results show that the influence of surface material outgassing on the in-situ atmospheric detection is very small, even under the conditions of medium solar activity and medium geomagnetic activity, while the influence of the attitude control jet on the in-situ atmospheric detection is large but can be reduced by reducing the low-altitude attitude control operation and decreasing the transmission probability. Through simulation optimization and according to engineering needs, increasing the nozzle outlet cross-sectional area, increasing the temperature of the gas used for attitude control, increasing the nozzle rotation angle, increasing the nozzle outlet angle, or increasing the nozzle center height can reduce the transmission probability. This model can simulate and analyze the influence of both surface material outgassing and attitude control jets on in-situ atmospheric detection, optimize relevant parameters, and provide new ideas for relevant work.

中文翻译：

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探空火箭放气对原位大气探测影响的仿真分析

Meridian Project 的探空火箭任务使用质谱仪进行原位大气探测。为了评估表面材料除气和姿态控制射流对光谱仪探测的影响，对探空火箭平台进行了建模和仿真。本研究利用物理场仿真软件COMSOL和蒙特卡罗方法，研究了两种情况下的气体分子在与背景大气碰撞后是否能够进入原位大气质谱仪的传感器采样口。模拟结果表明，地表物质放气对原位大气探测的影响很小，即使在中等太阳活动和中等地磁活动条件下，而姿态控制射流对原位大气探测的影响较大，但可以通过减少低空姿态控制操作和降低传输概率来降低。通过仿真优化，根据工程需要，增大喷管出口截面积，提高姿态控制气体温度，增大喷管旋转角度，增大喷管出口角度，或者增大喷管中心高，都可以降低传播概率。该模型可以模拟分析地表物质放气和姿态控制射流对原位大气探测的影响，优化相关参数，为相关工作提供新思路。