In the first year of my Ph.D. I did some work evaluating the potential of mmWave for air-to-air communication. In our paper, we evaluated the rate performance of a multiuser MIMO (MU-MIMO) configuration where several aircraft communicate with a central hub in a star topology. We considered a hybrid subarray architecture, single path channels, and realistic atmospheric attenuation effects.
Many more high fidelity simulations and experimental studies have been developed since then, but the code I developed to compute mmWave link budgets might still be useful. In particular, there are lots of scripts that account for atmostpheric effects when computing path loss. To get a sense of what the software does, skim the paper first.