### Additional Context to Problem Statement:

Statistical algorithms are sought which produce joint estimates of satellite states from mixed angles, range, and range-rate information. It is desired that the method not approximate non-linear, gravitational dynamics yet remains computationally tractable for implementation on an industrial-class workstation. The method would be implemented using measurements from a heterogeneous sensor network.

As an example, a wide field-of-view telescope could be scanning a region of GEO and detect an uncatalogued debris object. Using the topocentric angles, a co-located LiDAR system could be cued to measure the objects range, range-rate, or both. The proposed method should be capable of utilizing the combination of measurements to rapidly determine the orbit of the debris object.