NEO Surveyor: Balancing Desats and Solar Pressure with Gravity

On its mission to track potentially-hazardous objects, NEO Surveyor will orbit the Sun-Earth L1 Lagrange point in a halo orbit while continuously surveying the sky. Daily momentum desaturation maneuvers (``desats'') and solar radiation pressure (SRP) forces perturb the spacecraft and require mitigation to avoid departure from the orbit. By incorporating time-varying averaged desat and SRP forces into the trajectory design as well as a dynamically-informed station-keeping strategy, the statistical maneuver cost and trajectory position errors are significantly reduced. These results validate the station-keeping strategy in a high-fidelity, ephemeris-based multi-body dynamics model with continuous ``low-thrust'' accelerations.