Triply redundant integrated navigation and asset visibility system
First Claim
Patent Images
1. An apparatus comprising:
- a system controller;
a Global Positioning System receiver coupled to the system controller;
a radio frequency locating receiver coupled to the system controller;
a precision timing subsystem coupled to the system controller; and
an operator interface coupled to the system controller;
wherein the system controller is configured to monitor at least one signal quality or location tracking characteristic associated with the Global Positioning System receiver;
wherein the system controller is configured to adjust a position fix associated with the radio frequency locating receiver based on a position fix associated with the Global Positioning System receiver in response to a determination that the at least one signal quality or location tracking characteristic indicates that the position fix associated with the Global Positioning System receiver is valid; and
wherein the system controller is configured to switch from the position fix associated with the Global Positioning System receiver to the position fix associated with the radio frequency locating receiver as a primary fix in response to a determination that the at least one signal quality or location tracking characteristic indicates that the position fix associated with the Global Positioning System receiver is invalid.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus are described for a navigation system. A method includes providing a global positioning system fix having a plurality of tracking parameters; providing a theater positioning system fix; monitoring the plurality of tracking parameters for predetermined conditions; and, when the predetermined conditions are met, sending a notifying signal and switching to the theater positioning system fix as a primary fix. An apparatus includes a system controller; a global positioning system receiver coupled to the system controller; a radio frequency locating receiver coupled to the system controller; and an operator interface coupled to the system controller.
71 Citations
25 Claims
-
1. An apparatus comprising:
-
a system controller; a Global Positioning System receiver coupled to the system controller; a radio frequency locating receiver coupled to the system controller; a precision timing subsystem coupled to the system controller; and an operator interface coupled to the system controller; wherein the system controller is configured to monitor at least one signal quality or location tracking characteristic associated with the Global Positioning System receiver; wherein the system controller is configured to adjust a position fix associated with the radio frequency locating receiver based on a position fix associated with the Global Positioning System receiver in response to a determination that the at least one signal quality or location tracking characteristic indicates that the position fix associated with the Global Positioning System receiver is valid; and wherein the system controller is configured to switch from the position fix associated with the Global Positioning System receiver to the position fix associated with the radio frequency locating receiver as a primary fix in response to a determination that the at least one signal quality or location tracking characteristic indicates that the position fix associated with the Global Positioning System receiver is invalid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. An apparatus comprising:
-
a system controller; a Global Positioning System receiver coupled to the system controller; a radio frequency locating receiver coupled to the system controller; an operator interface coupled to the system controller; an inertial navigation system coupled to the system controller; a sensor array coupled to the system controller; and a precision timing subsystem coupled to the system controller; wherein the system controller is configured to calculate a difference between a position fix associated with the Global Positioning System receiver and a position fix associated with the radio frequency locating receiver, and wherein the system controller is configured to switch from the position fix associated with the Global Positioning System receiver to the position fix associated with the radio frequency locating receiver as a primary fix when the difference exceeds a predetermined threshold value. - View Dependent Claims (17, 18, 19, 20)
-
-
21. An apparatus comprising:
-
a system controller; a Global Positioning System receiver configured to provide a first position fix to the system controller based on receipt of a plurality of Global Positioning System satellite signals; a multilateration radiolocation receiver configured to provide a second position fix to the system controller by multilateration based on receipt of a plurality of spread spectrum radiolocation signals; an inertial navigation system configured to provide a third position fix to the system controller; and a timing subsystem coupled to the system controller; wherein the system controller is configured to select the first position fix, the second position fix, the third position fix, or a composite position fix as a primary position fix based on at least one characteristic of the first position fix, the second position fix, or the third position fix. - View Dependent Claims (22, 23, 24, 25)
-
Specification