Description
We present comprehensive simulations of Earth's radar systems as potential technosignatures detectable by extraterrestrial observers. While SETI has traditionally focused on deliberate transmissions, we examine unintentional electromagnetic leakage from civilian airport radars and military radar systems. These technologies, essential to any advanced civilization's infrastructure, produce significant radio emissions that may be detectable across interstellar distances. Our study implements a cosecant squared beam model for civilian radar and a phased array beam simulation for military systems to realistically characterize their emission patterns. We analyze how the global distribution of radar installations affects the temporal structure of Earth's radio signature when observed from six specific stellar systems: Barnard star, HD 48948, HD 40307, AU Microscopii, HD 216520, and LHS 475. We demonstrate how a planet's infrastructure deployment significantly influences the detectability and characteristics of its technosignatures. The results reveal distinct patterns in radio leakage that depend on both terrestrial radar distribution and observer location, providing valuable insights for future SETI strategies. Our findings suggest that radar systems, represent among the most detectable unintentional technosignatures of technological civilizations, offering a promising avenue for extraterrestrial intelligence detection.
