Weather avoidance algorithms play a crucial role in significantly enhancing aircraft safety during flight operations, particularly in the presence of severe weather conditions. This paper presents a novel obstacle avoidance strategy based on the use of alternative paths to circumvent obstacles during the cruise phase. The objective of this study is to assess the benefits of using strategic information to address tactical avoidance issues. Firstly, the new strategy is simulated in a dynamic space populated with weather obstacles. Subsequently, the proposed strategy is compared to a classical avoidance maneuver in several dynamic simulations, varying the size of the obstacles. The results show that including strategic information on dynamic rerouting can be of significant benefit to both the pilot and air traffic controller, providing a supportive decision-making tool for bad weather avoidance.

Aircraft trajectory generation is one of the key technologies for realizing and researching a highly efficient air traffic system. Fast-time simulations are used for the initial evaluation of newly proposed operational concepts, and the employed scenarios must be faithful to actual aircraft operations and include a wide range of possible future events. In addition, since aircraft trajectories are influenced by numerous complex factors, incorporating these factors into the generation process is essential to improve the fidelity of the generated trajectories. This study employed a deep generative model to capture these factors, with surrounding traffic conditions selected as a representative example. In particular, a flow-based generative model was employed to obtain the generation probability of the trajectory to allow evaluation based on the probability of events occurring in the simulation. The generated trajectories were confirmed to be consistent with the operational flight envelope and surrounding traffic using publicly available track data.

The L-band digital aeronautical communications system (LDACS) is a broadband, secure digital communications system based on cellular technology, designed specifically for aeronautics applications. It enhances the safety and efficiency of air traffic management (ATM) by supporting innovative paradigms such as 4D trajectory-based operations (TBO). Given that the LDACS frequency band is also allocated for aviation surveillance and navigation equipment, ensuring electromagnetic compatibility (EMC) with these systems is critical. The determination of requirements for collocating LDACS and aeronautical surveillance systems in L-band has already started, recently. However, realistic and solid measurement findings are necessary to determine the condition for co-existence. This study investigates the EMC between LDACS and surveillance transponder (XPDR) to establish the required attenuation levels for their onboard coexistence. Two transponders are used as devices under test (DUT): one tailored for small aircraft and the other for large aircraft. Through a combination of experimental analysis and estimations, the study identifies the attenuation levels necessary for LDACS-XPDR coexistence. These findings enable the implementation of measures such as antenna separation or out-of-band rejection filters to facilitate the effective integration of LDACS and XPDR onboard aircraft.