Hyun Chul Ko , University of Colorado Boulder, Daniel J. Scheeres, University of Colorado Distinguished Professor
https://doi.org/10.64861/OFWA5066
Keywords: Orbit Determination, Maneuver Detection, Event Representation
Abstract:
The classical orbit determination (OD) method of dealing with unknown maneuvers is to restart the OD process with post-maneuver observations. However, it is also possible to continue the OD process through such unknown maneuvers by representing those unknown maneuvers with an appropriate event representation. Event representation using Thrust-Fourier-Coefficients (TFCs) rigorously provides a unique control law that can generate an equivalent orbital change for a given unknown maneuver. This paper presents applications of this representation approach to real-time orbit tracking problem across unknown maneuvers. The modified extended Kalman filter with TFCs is capable of fitting tracking data in real time and maintaining an OD solution in the presence of unknown maneuvers. Simulation results also show that the modified filter is found effective in detecting a sudden change in TFC values which indicates a maneuver.
Date of Conference: September 15-18, 2015
Track: Poster