Telemetry Re-Radiation System
January 01, 2008Download PDF
Enclosed weapon bays on modern aircraft interfere with prelaunch, Flight Termination System verification during training test launches. Range safety personnel need to verify the functionality of the flight termination system prior to missile launch. The missile telemetry RF is highly attenuated when the aircraft missile bay doors are closed, limiting the range for which the aircraft can fly during training flights.
TTC and Lockheed Martin designed a system to provide telemetry data for these aircraft. The system re-radiates the telemetry from the missiles with the weapon bay doors closed. This paper describes the design considerations for this flexible system that accommodates multiple weapon systems in multiple weapon bay configurations.
This paper discusses the system trade studies and implementation of a system that radiates the Flight Termination System (FTS) ground signal to the missile system in an enclosed weapons bay while re-radiating the telemetry Radio Frequency (RF) signals for a closed loop FTS system verification prior to launch.
Designing a Re-Radiation (Re-Rad) system with the multiple weapon system presented the following challenges to the design and implementation team:
- Multiple weapon systems at varying data rates and modulation schemes
- Avoid increasing the data error rates not to affect the overall link margin
- Antenna location for best reception with the varying missile arrangements
- Combining up to four RF/Data streams for transmission
Download the white paper to read more.