Space Truth: The Non-TLE-Based Propagator The US Space Force has identified the need to improve Space Domain Awareness (SDA) capabilities. To adequately account for orbit trim maneuvers (OTM) and trajectory correction maneuvers (TCM), higher fidelity propagators are needed. The main component of this Space Truth: The Non-TLE Based Propagator effort is establishing these highly precise, low-error models for spacecraft location and velocity propagation. Our Space Truth: The Non-TLE Based Propagator aims to accurately predict positioning from ground-based optical sensing, surpassing that which can be achieved with standalone TLE sets.