GPS Repeaters For Aircraft Hangars
The structure of an aircraft hangar can block the ingress of GPS signals, making it impossible to test on-board navigation equipment without pushing the aircraft outside where it has a view of the sky.
A GPS repeater system overcomes this physical barrier by transferring the outdoor signals to the interior of the hangar, which means all maintenance work can be carried out indoors.
The repeater system (also known as a re-radiator):
- Receives the satellite signals via an external GPS antenna.
- Sends the signals down a coaxial cable to a repeater unit (sometimes multiple units) inside the hangar.
- The repeater amplifies and re-radiates the signals indoors so that all GPS receivers within range can use the outdoor signals.
In a military situation, the same applies regarding the ability to carry out maintenance without leaving the safety of the hangar.
Additionally, a fighter jet would normally experience a satellite acquisition delay when exiting the hangar in a hurry – the time-to-first-fix (TTFF) could be a dangerously long period of time.
A GPS repeater ensures that fighters always have GPS lock when inside the hangar to ensure there is no satellite acquistion delay upon exit
GPS frequency bands covered
Repeater systems are available to cover the following frequencies:
- L1 (1575 MHz)
- L2 (1227 MHz)
- GLONASS (1602 MHz)
- Galileo (1575 MHz)
An L1 system is the most popular option; the addition of an L2 signal gives a much more accurate positional fix and is widely used in military and civil aviation applications.
The Russian GLONASS signals and European Galileo signals are also available.
Special offer: 25% reduction on L1/L2 repeater kits while stocks last – details
The repeater unit has a built-in re-radiating antenna with a beam width >160 degrees.
The coverage area achieved is partly determined by the hight of the repeater above the ground.
Generally – one repeater unit placed 10M above ground level will provide coverage within a 35 – 40M radius.
This typical 150m x 75m hangar has virtually full coverage from two GPS repeater units mounted 12 metres above ground level
Repeaters can also be wall-mounted with their signal beaming horizontally across the indoor space.
A repeater kit comes with all you need to get indoor GPS signal in your hangar.
For larger areas where one single repeater is not enough we can offer you a custom-designed-system to meet your exact requirement.
Contact FalTech GPS if you have any questions or call 01326 336444.