Datenblätter

• Detects and protects against GNSS spoofing and jamming
• GNSS multipath propagation mitigation and anti-RF meaconing*
• Isolates IT infrastructure from GNSS threats
• Detects and protects against GNSS time synchronization attacks
• Active filter LEVEL-2* for GPS L1 interference suppression
• GNSS simulation output to NTS-5000 ANT inputs

“SafeTime GNSS Guard”, similar to a network firewall, solves the problem of protecting existing IT/OT systems by creating a separation between physical GNSS and the NTP/IEEE1588 time server.

It protects all ELPROMA time servers, including NTS-5000 and NTS-4000. “SafeTime GNSS Guard” is suitable for critical infrastructures such as banks, stock exchanges, air traffic control, railroads, power plants, telecommunications or insurance companies from untrusted satellite-based GNSS signals.

It is a software engine that analyzes the time signals of GPS, GALILEO, GLONASS, BEIDOU or IRNSS separately by providing simulated GNSS outputs that are 100% compatible with GPS L1.

The SafeTime GNSS Guard application is equipped with a special time analysis. It can optionally be equipped with an active GPS L1 interference filter (zero steering technology, protection against amateur mobile GPS L1 jammers). Together with other algorithms, it protects the time server inputs from GNSS jamming and/or tampering. Operation is based on checking several factors, including interference criteria such as number of GNSS satellites, GNSS antenna location mismatch, phase/time deviation, RF intensity/signal strength or the SNR levels of the GNSS signals.

The LOG data can optionally be stored in or exported to an external SCADA/NMS/OSS class. SafeTime GNSS Guard works with all leading OSS-class software programs via MIB-2 traps. In addition, the UTC reference time can be transmitted from a remote time backup center to SafeTime Guard's LAN interface.

The system accepts cryptographically authenticated NTP and/or PTP IEEE15 protocols to obtain a reference time from national metrology institutes. In the event of network failures or cyber attacks (DDoS attacks, TDA - Time Delay Attack), the device automatically switches to holdover mode (OCXO or Rubidium, depending on the equipment). The synchronization accuracy of the device is better than 1us.