The Department of Defense (DoD) is seeking proposals for a Sporadic E Predictive Model as part of its SBIR 23.3 BAA. The objective of this project is to deliver a predictive model that allows users to forecast sporadic E statistics, such as the percent of the day with blanketing or sporadic E, as well as the expected peak frequency of sporadic E. The model should be data-assimilative and global, utilizing data sources such as ionograms, radio occultation measurements, high altitude wind measurements, and sporadic E seed population data. The project will be conducted in two phases, with Phase I focusing on demonstrating the feasibility of using existing data sources, and Phase II developing a data-assimilative forecast model. The model will be validated using existing data sources and compared to median climatology estimates. The proposed model has potential applications in government and private organizations that rely on accurate predictions of RF interactions with the space environment, including the US Space Force Space Systems Command, Air Combat Command, the US Navy, and other DoD and Title 50 organizations. The solicitation is currently closed, with a release date of August 23, 2023, an open date of September 20, 2023, and a close date of October 18, 2023. More information can be found on the DoD SBIR 23.3 BAA page on grants.gov.