Radio frequency propagation data provides information integral to constructing and validating models of the ionosphere. Modern computing methods have led to advances in simulations capable of including the coupled physics often required to properly account for impacts on radio frequency propagation. There are now dozens of ionospheric models that have been developed by the community with varying degrees of maturity and availability; however, we still lack an understanding of whether these models meet the basic needs of radio propagation modelers and users. This is an opportunity for community members to share their ideas and proposals for how best to conduct comprehensive model testing in an environment with diverse modeling methodologies. This session seeks contributions covering advancements in validation studies using metrics relevant to radio frequency applications, such as HF communications, Over-the-Horizon Radar, and scintillation modeling. Contributions highlighting current coordinated model validation efforts or new methodologies are especially encouraged.