System and method for detecting interference in global positioning satellite signals

• US 20030114983A1
• Filed: 10/15/2002
• Published: 06/19/2003
• Est. Priority Date: 04/13/2001
• Status: Active Grant

• Current Assignee: General Dynamics Mission Systems Inc. (General Dynamics Corporation)
• Original Assignee: General Dynamics Advanced Information Systems Incorporated (General Dynamics Corporation)
• Inventors: Irvin, Dean, Gerten, Greg, Sweetapple, Lee
• Granted Patent: US 7,512,492 B2
• Time in Patent Office: Days
• US Class Current: 701/214
• CPC Class Codes: G01S 19/21 Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service

Abstract

A system and method are provided for detecting local interference in GPS signals. A plurality of remotely located GPS receivers are capable of receiving GPS signals and producing GPS related data. A monitoring station is capable of storing at least one expected GPS parameter for each of the plurality of GPS receivers. A first processor at the monitoring station is programmed to determine, for each of the GPS receivers, whether said GPS related data deviates from any of the at least one GPS parameter by more than a predetermined range of error, and for issuing a warning in response thereto.

Claims

1. A method for detecting errors in GPS accuracy, comprising:

determining an initial GPS position of a marker;

receiving GPS signals at the marker;

calculating, from the GPS signals, a GPS coordinate position of the marker;

comparing the GPS coordinate position and the initial GPS position; and

issuing a warning if the GPS coordinate position differs from the initial GPS position by more than a predetermined amount.