1. A method of augmenting orbit determination to estimate maneuvers for Earth-orbiting satellites, said orbit determination including a sliding window of measurement residuals computed as the difference between predicted and measured data and running an orbit determination (OD) engine comprising a statistical estimator to update orbit parameters, said OD engine including a data reduction capability to remove outlier measurement residuals, said method comprising: processing the measurement residuals to identify and validate those residuals that are either consistent with the current orbit parameters or an allowable maneuver of the Earth-orbiting satellites and to reject the remaining measurement residuals; processing the validated measurement residuals to detect an occurrence of a maneuver; if a maneuver is detected, generating a maneuver estimate; enabling the data reduction capability and running the OD engine with the maneuver estimate on the validated measurement residuals to update the orbit parameters, said OD engine removing validated measurement residuals that present as outliers given the current orbit and maneuver estimate; evaluating an objective function to determine whether the maneuver estimate satisfies a quality metric, said objective function including a residual fit component to the current orbit and maneuver estimate, an orbit consistency component and a penalty component for validated measurement residuals rejected by the OD engine; and updating the maneuver estimate until the objective function satisfies the quality metric.