<p>Using over 20,000 dropsonde observations, this study presents a composite analysis of atmospheric ducts (ADs) under tropical cyclone (TC) conditions, revealing their asymmetric distribution relative to TC structure. In addition to examining the influence of TC motion on the spatial distribution of ADs, this research also investigates the impact of vertical wind shear (VWS) on the asymmetry of AD characteristics. This study provides the first statistical characterization of AD properties within the eye region of TCs. The results reveal distinct structural features of elevated ducts (ELDs), with their strength, thickness, and occurrence probability progressively increasing with radial distance from the TC center. Within the radius of maximum wind (RMW), ELD strength, thickness, and occurrence probability are significantly lower than the overall average, indicating that the TC eye is generally unfavorable for ELD formation. Compared to TC motion, VWS induces more pronounced asymmetries, especially beyond the radius of the outermost closed isobar (ROCI). ELDs in the left-front (LF) quadrant relative to VWS are typically weaker, shallower, and less frequent, while those in the right-back (RB) quadrant are stronger, deeper, and more frequent. The contrast intensifies with stronger VWS, with the greatest asymmetry shifting from the LF to the RB quadrant when VWS exceeds 20 m s⁻¹. Statistical analysis further reveals that TC intensity influences ELD properties. Outside ROCI, ELDs under tropical depressions exhibit significant differences compared to those associated with higher intensity TCs. These findings enhance current understanding of AD behavior under TC conditions and may offer valuable guidance for designing and operating electromagnetic communication systems in severe weather environments.</p>