Supersonic Aerodynamic Decelerators for Planetary Exploration: Advances in the Last Two Decades

Over the past two decades, planetary exploration missions have driven significant advances in supersonic aerodynamic decelerators. This paper reviews the evolution of these technologies since the seminal 2006 survey by Cruz and Lingard, summarizing developments across flight missions, ground and flight test campaigns, analytical and computational methods, and emerging materials and deployment technologies. Eleven major missions from 2006-2025 are examined, highlighting design variations, deployment environments, anomalies, and reconstructed performance enabled by increasingly rich telemetry. The paper also synthesizes results from full-scale and subscale wind tunnel testing, sounding-rocket-based supersonic testing, and the Low-Density Supersonic Decelerator program’s advancements in supersonic inflatables, ballutes, and large ringsail-type parachutes. Recent progress in fluid–structure interaction modeling, material characterization, permeability modeling, and high-fidelity measurement techniques is reviewed, along with challenges in system-level validation. Finally, the paper outlines decelerator architectures for upcoming missions to Mars, Venus, and Titan, and discusses emerging materials, mortar technologies, and soft-confluence systems that may shape next-generation designs. Together, these developments represent a maturation of planetary aerodynamic decelerators comparable to the foundational efforts of the 1960s-1970s, and underscore the importance of comprehensive documentation and data release to support future technology advancement.