Sensis Multilateration and ADS-B System Provides Air Surveillance for US Navy at Patuxent River

DEWITT, NY - November 1, 2001 - Sensis Corporation received a contract from DynCorp Range Technical Services, Lexington Park, Maryland to provide a proof of concept for an advanced air surveillance system for the Naval Air Station at Patuxent River, Maryland. The system's multilateration and Automatic Dependent Surveillance-Broadcast (ADS-B) sensors provide precise positional information at a rate of once per second, which traditional rotating radar can not provide, capturing the high speed tactical maneuvers during test range activities. Aircraft will be tracked from altitudes of 3500' to 50,000' over a 400 square mile area.

The system locates and identifies targets by utilizing inexpensive compact sensors on the ground that listen for transponder signals and triangulate them to determine the position of the signal's source. The transponder signals are also encoded with aircraft data, which the sensors decode and provide to air traffic controllers. Traditional transponders typically provide aircraft identification and altitude information. Advanced ADS-B transponders also broadcast latitude, longitude, velocity and heading information - as determined by the on-board avionics and the Global Navigation Satellite System.

Sensis Corporation provides sensors and information technology to the world's militaries, civil aviation authorities, airports and airlines. The company designs, manufactures and installs multilateration/ADS-B ground stations for air and surface surveillance, and sensor data interface equipment for integrating new and legacy, surveillance and automation systems. Sensis equipment is deployed around the world, including more than 80 multilateration/ADS-B sensors and 700 sensor data integration devices in 25 countries on 5 continents.