GPS signal all the way inside
the garage and dispatch
An ambulance leaving an underground bay often has no GPS fix yet. Precious seconds are lost before navigation 'catches'. Mercuron brings the GPS signal into the garage, so the vehicle is already located the moment it sets off.
Request an analysisThe problem: no GPS fix at the moment it matters
GPS works with extremely weak satellite signals that come straight from space. As soon as a vehicle is under a concrete deck, in an underground garage or in a shielded dispatch hall, there is no view of the sky and reception drops out entirely. The building acts as a Faraday cage for the satellite signal.
For emergency services, that is a concrete risk. When an ambulance, fire engine or response vehicle leaves an underground bay, the GPS receiver has to start from scratch: search for satellites, build a fix, determine position. That takes tens of seconds to several minutes — exactly while the vehicle is already on its way and the dispatch and navigation systems can't yet see it on the map.
With an indoor GPS solution, the vehicle already has a valid position before it leaves the garage. Navigation and tracking are active immediately.
Why every second counts
- Faster navigation start: the route is ready as it drives out
- Correct vehicle location in the dispatch and AVL system from second zero
- Reliable response times and records for reporting
- Less stress for the crew: no waiting for a fix on the way
The setup in brief
- Outdoor antenna with sky view captures the GPS/GNSS signal
- Controlled amplification brings the signal inside
- Indoor antenna re-radiates it in the target zone (garage, dispatch)
- Vehicles get a valid fix indoors — located immediately
How indoor GPS works
An indoor GPS system (also called GNSS re-radiation or a GPS repeater) captures the real satellite signal with an outdoor antenna that has a clear view of the sky — on the roof or in an open spot. That signal is brought inside via a controlled amplifier and re-radiated there by a small indoor antenna, in exactly the zone where it's needed: the garage, the bay or the dispatch.
The GPS receivers in the vehicles receive the same real satellite signal indoors that they would get outside. That way they already build a valid position fix inside. The system re-radiates only the existing signal — it does not generate or falsify any position.
Where indoor GPS makes the difference
Anywhere vehicles or devices need a position before they get outside.
Ambulance & fire garages
Underground or covered bays where response vehicles set off. The vehicle is already on the map when it leaves.
Dispatch & control rooms
Locations where vehicles are stationed and directed, and where fleet tracking must be correct immediately.
Underground car parks
Corporate and public car parks where fleets, shared vehicles or shuttles must know their position at departure.
Logistics & fleet management
Covered loading zones and depots where trucks and vans start with a correct GPS position for tracking and planning.
Workshops & inspection
Spaces where GNSS devices or vehicle systems are tested or calibrated with a real satellite signal indoors.
Technical test environments
Labs and integration spaces where GPS receivers need a reliable signal indoors for validation.
Our approach
Analysis
We assess the zone, the desired coverage and the spot for the outdoor antenna with a sky view.
Design
We size the system for the target zone, taking the regulations on re-radiation into account.
Installation
Antennas, cable routes and amplifier are neatly integrated, matched to your building and operation.
Measurement & handover
We demonstrate with measurements that vehicles get a reliable fix indoors, and document the setup.
Correct and within the rules
GPS/GNSS re-radiation is technically sensitive and regulated: the signal may only be emitted within the intended zone and must not cause interference outside. Mercuron designs every setup with the necessary shielding and tuning, so the solution works reliably and stays compliant. We always discuss the application and conditions with you in advance.
Frequently asked questions
No GPS in your garage or dispatch?
Tell us about the zone and the vehicles. We make a first assessment without costs or obligations.
Request an analysis