Dakota Ridge R&D is developing, prototyping, and patenting a passive shipboard capabilitiy to characterize refractivity environments, temperature, and water vapor vertical distributions. This rapid-cycle low size, weight and power (SWAP), low-maintenance device leverages oceanic horizon and upward high-resolution long-wave infrared images to characterize thermal structures (radio/RADAR ducting) into refractivity, meteorological temperature, and relative humidity profiles. Dakota Ridge’s capability supports acquisition of rapid sequence observations in the vicinity of the ship, to predict battlespace EM/EO propagation characteristics. Currently, no other passive/covert technology produces such resolute results. Extensive modeling and processing of CASPER West R/V Sally Ride Sea Trial observational data has been leveraged to demonstrate the technology’s viability. Dakota Ridge has an established strategic partnership and is collaborating with Ball Aerospace to support development and integration.