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Position and timing signals from global navigation satellite systems (GNSS) such as GPS, Galileo, GLONASS and Beidou have become the primary source of navigation for vehicles on land, water, and air.
Since GPS technology was developed decades ago, it has become commonplace in everything from cars to mobile phones to aircraft. Though GPS is widely used, access to GPS signals isn’t always guaranteed, even with the most modern systems.
In the case of military operations, GPS-jamming, whether intentional or not, can block vital signals from conveying critical information regarding positioning, navigation and timing. In these instances, it’s important for military vehicles and aircraft to be equipped with alternative navigation technologies to maintain operational readiness.
Honeywell has recently demonstrated multiple alternative navigation technologies for military aircraft. These new products are intended to help ensure seamless navigation, even when GPS signals are blocked, interrupted or unavailable.
Alternative navigation technologies provide a different means of measuring position, velocity and heading when GPS is disrupted. These technologies include the following:
- Vision-Aided Navigation: This technology uses a live optical or infra-red camera feed and compares it with maps to provide a passive, not jammable, highly accurate alternative position, navigation and timing solution that provides GPS-like accuracy in GPS-denied or jammed conditions.
- Celestial-Aided Navigation: The celestial-aided navigation technology observes stars and “reference objects” orbiting the earth such as satellites, which have known positions and velocities. This technology compares those reference objects to stars and can determine position and velocity, the same way a GPS could.
- Magnetic Anomaly-Aided Navigation: A navigation technology that measures magnetic strength using sensors and compares this data with known geographical magnetic maps to accurately identify the position of the aircraft relative to the Earth.
The prototype systems will be available in 2022 with initial deliveries expected to start in 2023, according to suasnews.com.