Supplier
Era Company
PLESS
Passive Long-range ESM Surveillance System, over-the-horizon — "Break the horizon".
Specs verified against manufacturer documentation
Pricing
Request a quote for current pricing, lead time and delivery to your airport.PLESS is a passive over-the-horizon direction-finding system that detects, locates, identifies and tracks air, land and naval targets, especially slow-moving or stationary platforms. It exploits tropospheric reflectivity to process signals from radars, jammers and datalinks beyond the radio horizon, providing covert long-range surveillance and ELINT classification.
From the manufacturer’s documentation
Technical specifications.
| Range | beyond the radio horizon via tropospheric reflectivity |
| Signal processing | pulsed and Continuous Wave (CW) |
| Localisation | 2D in multistatic deployment |
| Methodology | Direction Finding (AoA) with multilateration (TDOA) support |
| Automatic non-cooperative target identification | |
| Emitter Database (EDB) contribution | |
| Integrates with VERA-NG systems | |
Best for
Use cases.
- ›Long-range detection of ground-based air-defence radars
- ›Naval platform emitter identification (with AIS support)
- ›Airborne platform and UAS ground-control detection
- ›ELINT signal collection and exploitation