Sensor for small satellite relative PNT in deep-space. - Josiah DeLange; Seth Frick; Joel Runnels; Demoz Gebre-Egziabher; Kale Hedstrom (PLANS, 2016)

Estimator for Deep-Space Position and Attitude Using X-ray Pulsars. - Joel Runnels; Demoz Gebre-Egziabher (IEEE Trans. Aerosp. Electron. Syst., 2021)