GEOL-2600 Standalone Timing Receiver Module

GNSS-independent, high-precision timing via secure GEO satellite signals

The GEOL-2600 is a compact receiver module that delivers secure, high-precision timing without relying on GNSS, providing a resilient alternative for systems that demand continuous and trusted time.
GEOL-2600 altGNSS GEO-L Receiver Module

Provides trusted timing when GNSS alone isn’t enough

The GEOL-2600 is a compact, low-power receiver module that enables access to the altGNSS GEO-L signal, a SecureTime℠ GEO service. It provides a trusted source of UTC-traceable time using secure, one-way transmissions from geostationary satellites. By combining a custom receiver design, disciplined oscillator, and a highly directional antenna, the GEOL-2600 delivers high-precision timing without relying on GNSS.

Designed for integration into critical infrastructure and other fixed-location systems, the GEOL-2600 helps maintain timing continuity when GNSS signals are unavailable, unreliable, or insufficient on their own. This module is an ideal solution for applications that require resilient timing, such as power distribution, telecom networks, radar installations, and secure communications.

Features

  • Enables access to the altGNSS GEO-L signal, a SecureTime GEO service
  • Delivers sub-100 ns target timing accuracy with UTC traceability
  • Operates fully independent of GNSS constellations
  • Uses a directional antenna for enhanced interference and spoofing resistance
  • Receives a secure, one-way time signal — no return path required
  • Compact, low-SWaP design for easy platform integration
  • Includes disciplined oscillator for stable and reliable timing output
  • Standard 1 PPS and NMEA outputs for downstream interface
  • Ideal for fixed-location systems with known position
  • Supported by VIAVI for system integration and service activation


 

  • GNSS-Independent Timing Source

    The GEOL-2600 receives the altGNSS GEO-L signal, a SecureTime GEO service, to deliver UTC-traceable timing through secure, one-way transmissions from geostationary satellites—providing a reliable alternative when GNSS is unavailable or insufficient.

  • Enhanced Signal Resilience

    A highly directional antenna improves rejection of interference and spoofing, enabling reliable reception of the narrowband GEO-L signal and increasing trust in timing performance.

  • High-Precision Timing Output

    With a disciplined oscillator and sub-100 ns target performance, the GEOL-2600 provides accurate and stable timing through standard 1 PPS and NMEA interfaces.

  • Compact and Easy to Integrate

    The GEOL-2600 features a small form factor and low power draw, making it ideal for integration into fixed-site systems with limited space and strict power budgets.

  • VIAVI GEO-L Helical Antenna

    VIAVI’s GEO-L Helical Antenna is specifically designed to receive our altGNSS-GEO-L SecureTime service. The directionality allows the antenna to be pointed at the GEO satellite which reduces jamming and spoofing.

    The VIAVI GEO-L Helical Antenna includes the following:

    • Integrated mounting hardware for easy installation.
    • An application note describing the installation and orientation procedure.

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