NASA’s InSight mission to Mars will measure seismic signals to determine the planet’s interior structure. These highly sensitive seismometers are susceptible to corruption of their measurements by environmental changes. Magnetic fields, atmosphere pressure changes, and local winds can all induce apparent changes in the seismic records that are not due to propagating ground motions. Thus, InSight carries a set of sensors called the Auxiliary Payload Sensor Suite (APSS) which includes a magnetometer, an atmospheric pressure sensor, and a pair of wind and air temperature sensors. In the case of the magnetometer, knowledge of the amplitude of the fluctuating magnetic field at the InSight lander will allow the separation of seismic signals from potentially interfering magnetic signals of either natural or spacecraft origin. To acquire such data, a triaxial fluxgate magnetometer was installed on the deck of the lander to obtain magnetic records at the same cadence as the seismometer. Similarly, a highly sensitive pressure sensor is carried by InSight to enable the removal of local ground-surface tilts due to advecting pressure perturbations. Finally, the local winds (speed and direction) and air temperature are estimated using a hot-film wind sensor with heritage from REMS on the Curiosity rover. When winds are too high, seismic signals can be ignored or discounted. Herein we describe the APSS sensor suite, the test programs for its components, and the possible additional science investigations it enables.

中文翻译：

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InSight 辅助有效载荷传感器套件 (APSS)

美国宇航局的洞察号火星任务将测量地震信号以确定行星的内部结构。这些高度敏感的地震仪很容易受到环境变化的影响。磁场、大气压力变化和当地风都可以引起地震记录的明显变化，而这些变化并不是由于传播的地面运动造成的。因此，洞察号携带一组称为辅助有效载荷传感器套件 (APSS) 的传感器，其中包括磁力计、大气压力传感器以及一对风和空气温度传感器。在磁力计的情况下，洞察号着陆器波动磁场幅度的知识将允许将地震信号与自然或航天器来源的潜在干扰磁信号分离。要获取此类数据，三轴磁通门磁力计安装在着陆器的甲板上，以与地震仪相同的节奏获取磁记录。同样，InSight 携带了一个高度敏感的压力传感器，以消除由于平流压力扰动引起的局部地表倾斜。最后，使用来自好奇号火星车上 REMS 的热膜风传感器估计当地的风（速度和方向）和气温。当风太大时，地震信号可以被忽略或打折扣。在此，我们描述了 APSS 传感器套件、其组件的测试程序以及它可能实现的其他科学调查。InSight 携带了一个高度敏感的压力传感器，以消除由于平流压力扰动引起的局部地表倾斜。最后，使用来自好奇号火星车上 REMS 的热膜风传感器估计当地的风（速度和方向）和气温。当风太大时，地震信号可以被忽略或打折扣。在此，我们描述了 APSS 传感器套件、其组件的测试程序以及它可能实现的其他科学调查。InSight 携带了一个高度敏感的压力传感器，以消除由于平流压力扰动引起的局部地表倾斜。最后，使用来自好奇号火星车上 REMS 的热膜风传感器估计当地的风（速度和方向）和气温。当风太大时，地震信号可以被忽略或打折。在此，我们描述了 APSS 传感器套件、其组件的测试程序以及它可能实现的其他科学调查。