Real time passive threat positioning system

US5406286A · kind A · utility

Assignee

• Honeywell Limited · US

Inventors

• My Tran · Albuquerque, US
• John E. Rasinski · Albuquerque, US
• Michael J. Garsik · Rio Rancho, US

Key dates

• Filing date: Nov 17, 1992
• Grant date: Apr 11, 1995
• Expiry date: Nov 17, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/021
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A data correlated real time passive threat positioning system uses parallel estimated navigation filters. A threat data correlation process accepts radar warning receiver track file data and generates correlated threat data. A threat data management system and a raw threat positioning system accepts aircraft heading and angle of arrival of the threat to generate a threat status indicator and a threat position measurement. Navigation filtering management apparatus accepts the threat status indicators and provide position filter controls. Parallel estimation navigation filters use the position filter control and the threat of position measurements to generate estimated threat positions for a number of threats. The estimated threat positions are updated and threat situation awareness is presented to the pilot in real-time. Elevation extraction apparatus uses a terrain data base and the threat estimated position to predict the elevation of the threat. Threat data including latitude, longitude and elevation is provided to other systems.