Enabling leaders with the ability to make decisive actions in high operational tempo environments is key to achieving decision-superiority. Under stressful battlefield conditions with little to no time for communication, it is critical to acquire relevant tactical information quickly to inform decision-making. A potential augmentation to tactical information systems is access to real-time analytics on a unit's operating status and emergent behaviors inferred from soldier-worn or embedded sensors on their kit. Automatic human activity recognition (HAR) has been greatly achievable in recent years thanks to advancements in algorithms and ubiquitous low-cost, yet powerful processors, hardware and sensors. In this paper, we present weapon-born sensor measurement acquisition, processing, and HAR approaches to demonstrate Soldier state estimation in a target acquisition and tracking experiment. The Soldier states that were classified include whether the Soldier is resting, tracking a target, transitioning between potential targets, or firing a shot at the target. We implemented Multivariate Time Series Classification (TSC) using the SKTime toolkit to perform this task and discuss the performance from various classification methods. We also discuss a framework for efficient transference of this information to other tactical information systems on the network.
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