Revisiting Mars' Induced Magnetic Field and Clock Angle Departures Under Real‐Time Upstream Solar Wind Conditions

Abstract Mars lacks a global intrinsic dipole magnetic field, but its interaction with the solar wind generates a global induced magnetosphere. Until now, most studies have relied on single‐spacecraft measurements, which could not simultaneously capture upstream solar wind conditions and the induced magnetic fields, thereby limiting our understanding of the system. Here, we statistically re‐examine the properties of Mars' induced magnetic field by incorporating, for the first time, real‐time upstream solar wind conditions from the coordinated MAVEN and Tianwen‐1 observations. Our results show that both solar wind dynamic pressure and the interplanetary magnetic field (IMF) magnitude enhance the strength of the induced magnetic field, but they exert opposite effects on the compression ratio: higher dynamic pressure strengthens compression, while stronger IMF weakens it. The induced magnetic fields are stronger under quasi‐perpendicular IMF conditions than under quasi‐parallel IMF conditions, reflecting a stronger mass‐loading effect. We further investigate the clock angle departures of the induced fields. They remain smaller in the magnetosheath near the bow shock, increase gradually toward the induced magnetosphere, and become significantly larger within the induced magnetosphere. In addition, clock angle departures are strongly enhanced under quasi‐parallel IMF conditions. Their dependence on upstream drivers further shows that within the magnetosheath, clock angle departures are minimized under low dynamic pressure, high IMF magnitude, and low Alfvén Mach number conditions. These results may enhance our understanding of solar wind interaction with Mars and highlight the critical role of multi‐point observations.