A TECHNIQUE FOR DETERMINING RELATIVE YAW USING PHASE WINDUP

摘要

A technique uses "phase windup" to determine relative yaw of a craft from a plurality circularly polarized signals transmitted from one ar more transmission sources. A first difference in carrier phase measurements taken simultaneously at tim e t1 is determined for first and second circularly polarized signals from a given transmitting source, A second difference is then determined from simultaneous carrier pha se measurements taken at time t2. A third difference, which is the difference between the first and second differences, is then used to determine the relative yaw bas ed on a difference in wavelengths of the two signals. If more than one transmitting source is in view, a mean average ofthe third differences associated with the respective transmitting sources may be used to determine the relative yaw.