초록 ▼

Carrier signal cycle slip errors occurring at a receiver in a satellite-based navigation system, such as NAVSTAR GPS, are detected. A continuous navigation signal is received from a satellite. Cycles of the carrier wave of the navigation signal are counted over a time .DELTA.t. The cycle count and t

Carrier signal cycle slip errors occurring at a receiver in a satellite-based navigation system, such as NAVSTAR GPS, are detected. A continuous navigation signal is received from a satellite. Cycles of the carrier wave of the navigation signal are counted over a time .DELTA.t. The cycle count and the time .DELTA.t are used to compute a first velocity of the receiver along a vector between the receiver and the satellite. A second velocity of the receiver is received from an inertial reference unit associated with the receiver. A component of the second velocity along the vector to the satellite is computed. A difference between the first and second velocities is then computed and compared to predetermined value. If the difference exceeds the predetermined value, then a cycle slip error is indicated.

대표청구항 ▼

[ What is claimed is:] [1.] A method for detecting carrier signal cycle slip errors in a position determining system which receives navigation signals at a receiver from a plurality of satellites, the method comprising the steps of:(a) receiving, at the receiver, a navigational signal from a satelli

[ What is claimed is:] [1.] A method for detecting carrier signal cycle slip errors in a position determining system which receives navigation signals at a receiver from a plurality of satellites, the method comprising the steps of:(a) receiving, at the receiver, a navigational signal from a satellite, said navigation signal including a continuous carrier wave;(b) counting cycles of said carrier wave over a time .DELTA.t;(c) computing, from said time .DELTA.t and said cycle count, a first velocity of the receiver along a vector between the receiver and said satellite;(d) receiving a second velocity of the receiver from an inertial reference unit;(e) computing a component of said second velocity along said vector;(f) computing a difference between said first velocity and said component of said second velocity;(g) comparing said difference to a predetermined value; and(h) indicating a cycle slip error if said difference exceeds said predetermined value.