The epoch state navigation filterThe formulation of a recursive maximum likelihood navigation system employing reference position and velocity vectors as state variables is presented. Convenient forms of the required variational equations of motion are developed together with an explicit form of the associated state transition matrix needed to refer measurement data from the measurement time to the epoch time. Computational advantages accrue from this design in that the usual forward extrapolation of the covariance matrix of estimation errors can be avoided without incurring unacceptable system errors. Simulation data for earth orbiting satellites are provided to substantiate this assertion.
Document ID
19780048003
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Battin, R. H. (Charles Stark Draper Laboratory, Inc.; MIT, Cambridge, Mass., United States)
Croopnick, S. R. (Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Edwards, J. A. (Charles Stark Draper Laboratory, Inc. Cambridge, Mass., United States)