“…The standard PMHT restricts the prior to be either constant, or time independent. Existing PMHT research does not address the assignment prior; effort has instead focussed on the target dynamics model [4,8,6,9], more sophisticated measurement models [10][11][12], and matters of practical significance for realistic implementations [7,13,14]. A model is proposed here which allows the assignment prior to be a randomly evolving quantity.…”