Cost-effective solution for simulation of GPS L1 signals with live sky synchronization

Require Ettus Research USRP with GPSDO and UBLOX M8T

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spoofing resistance testing of the GPS receiver
Key Features

Key Features

We have developed this application for testing our GNSS spoofing detection system, as well as for researching potential attack scenarios. The application allows you to modify key parameters (such as power, pseudorange, Doppler, and navigation message content) for emulating controlled spoofing attacks.

Security and Operational Benefits:

  • Conduct comprehensive research in the field of spoofing detection and prevention methods;
  • Test the existing infrastructure for spoofing vulnerabilities
  • Evaluate the quality of our spoofing detection system.
  • Simulate a GPS L1 spoofer in synchronous and asynchronous modes for developing the corresponding protection methods and detecting potential vulnerabilities of the equipment to spoofing and jamming attacks;
  • Multiple instances of the App can be grouped into a cluster with a single control for simulating synchronous spoofing with multiple TX;
  • Supports conducted connection to the device under test for laboratory testing and radiated connection for field testing;
  • Synchronization accuracy with a live-sky signal that does not exceed 250 nanoseconds;
  • Capable of adding multiple impairments to the signals like timecoordinates shift, satellite’s relative power, pseudorangeDoppler offset, etc.;
  • Can add various types of jamming to the signal like wideband noise, continuous wave, etc.;
  • Utilizes genuine almanac and ephemeris data.



Required Hardware

Supported Operating Systems

  • Windows 10 (32-bit and 64-bit);
  • Windows 8 (32-bit and 64-bit);
  • Windows 7 SP1 (32-bit and 64-bit).

Minimum System Requirements

  • Intel® Core™ i3 Processors;
  • RAM 8 GB;
  • Free hard drive space 1-GB;
  • One port USB 3.0;
  • Two ports USB 2.0;
  • Internet.

Supported GNSS

GPS L1 C/A, 12 satellites

GPS spoofing simulation modes

  • Asynchronous;
  • Synchronous.

Live sky synchronization with

Live sky synchronization time accuracy

± 250 ns to UTC RMS (2- Sigma)

GPSDO 10 MHz Accuracy

1 ppb

Maximum USRP Output Power, RMS

15 dBm

Minimum USRP Output Power, RMS

-65 dBm

Output Power Regulation Step

0,5 dB

Almanac source

Ephemeris source

GPS signal impairments

  • 1PPS shift;
  • ToW shift;
  • LLA shift;
  • DUT ECEF noise and offset;
  • Satellites power, pseudorange, Doppler offset;
  • Jamming simulation.

The installation package contains

  • NI Labview Run-Time Engine 2018 f1
  • NI GNSS Simulation Toolkit 3.0
  • Python 3.7.2
  • Patrotest Application Manager
  • 7-zip
  • UHD driver for USRP
  • drivers for UBLOX & USB-RS232 converter


GP-Simulator Evaluation Kit

  • Lenovo ThinkPad with the preinstalled software;
  • Ettus Research USRP B200 with GPSDO and additional shelldering;
  • Directional coupler, two 30 dB attenuators and a SMA cable for conducted tests;
  • Ublox M8T GNSS receiver for live sky synchronization with a USB cable and USBRS-232 adapter;
  • All equipments is placed on a plastic panel;
  • Evaluation Kit comes in the NANUK 923 protective case.

Kindly send us your enquiry via the form below and we will contact you shortly

Full name

Company name






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