GNSS Simulator gSim - Dual Frequency GPS Galileo Simulator

Features

• Dual frequency GPS L1 C/A, L5 I&Q, Galileo E1 B&C, E5A I&Q
• Simple (automatic) or advanced (manual) simulation scenario setup
  • Static and dynamic scenarios
  • 10 Hz user position input
  • LLH or ECEF coordinates
• Variable user velocity (limited to 590 m/s for Demo and Commercial licenses)
• Line-of-slight and two reflected (multipath) signals
• Spoofed signals with the same or different navigation messages
• Navigation message update
• Navigation message modification
• Modeling the navigation message transmission errors
• Modeling the satellite orbit and atomic clock errors
• Klobuchar ionospheric propagation model
• Creating complex simulations using third-party math software
  • A signal propagation model dependent on the user’s position and the azimuth and elevation of the navigation satellite
  • Complex ionospheric propagation model
  • Atmospheric effects like scintillation
  • Jamming and spoofing
  • Dynamic stress
• Multi-core processor support
• Cost-effective SDR signal transmitters
• gSim Converter (as external add-on HW) for dual L1/E1 and L5/E5A signal generation
• Commercial, Space, and Demo Software licenses

gsim-operation-manual.pdf

Simulation Scenarios

Static Scenario – Nizbor

Nizbor is a village located on the banks of the beautiful Berounka River in central Bohemia. Within the village, there is a Celtic oppidum, and a castle is situated on a nearby hill. Adjacent to the castle, we have a waypoint with magical coordinates 50°N,14°E, which we call Nizbor.

The figures present the scatter plots of static user scenarios in Nizbor way point measured by a dual-frequency GPS – Galileo receiver. The signal was replayed by a BladeRF (left) and HackRF (right) SDR.

3D scatter plots, static position errors, as well as other static and dynamic simulation scenarios, are introduced in gsim-simulation-guide.pdf

Are you interested in this technology?

Multipath Error Envelope

Multipath propagation is one of the main sources of position errors in GNSS. The receiver’s capability to suppress multipath propagation is measured using a signal model with a Line of Sight (LOS) and one delayed reflected signal. The results are graphically expressed as a multipath error envelope plot. The left figure presents a multipath error envelope of the GPS L1 channel equipped with a double delta correlator. The right figure shows the multipath error envelope of the Galileo E1 channel.

Presented Multipath Error Envelopes were measured by gSim using a reflected signal generator.

Leap Second

Adding or removing leap seconds to UTC is used to correct UTC to astronomical time. gSim allows testing the response of a GNSS receiver to a leap-second event.

LEO Satellite GPS Receiver Test

gSim can test space GNSS receivers. The figure presents the test results of the piNav GPS receiver in Low Earth Orbit. The piNav GPS receiver was developed by Pavel Kovar for positioning the LEO CubeSats. The receiver is equipped with an orbit propagator that enables Dead Reckoning navigation when the GPS signal is out.

Notice a short simulated signal dropout at time 2100 s. The outage of the GPS signal was bridged with the help of the propagator.

Would you like to try gSim before buying?

Contact us for a demo version of gSim.

The Demo license is limited to a single frequency. It generates only GPS C/A and Galileo E1
signals. The generation of other signals is automatically disabled. The simulation duration
is set to 60 seconds.

You can BUY your own licence for commercial use

You can order the COMMERCIAL version of gSim with a speed limit up to 590 m/s

PRICE: 3,800 EUR plus 60 EUR shipping

You can order the SPACE version of gSim without a speed limit
(How to buy the SPACE version? Buy COMMERCIAL version first. We will ask for export licence. If an export license is obtained, the customer will be asked to pay extra for the price of the unrestricted (SPACE) version. We will send the gSim without speed limitation and a new license file by e-mail which will be used with the already purchased gSim Converter. Failure to obtain an export license is not grounds for return of the COMMERCIAL version. Export of the unrestricted (SPACE) version is possible to countries for which an EU General Export Permit or National Export Permit applies, or if an individual export permit can be obtained.

PRICE: upon request

Simply send us your order by email. We will send you an invoice and a license key after payment.

Notice

GNNS The gSim Simulator (with limited and unlimited speed) can be used by the owner of the gSim Converter who has received the license file for that software version. The serial number and license file number must match.
There are no restrictions on the sale of the speed-limited version of gSim.

The documentation gives the configuration of the computer and software on which gSim has been tested. The manufacturer makes every effort to ensure that gSim can be run on different hardware and under different versions and distributions of Linux. However, full compatibility cannot be guaranteed.

The user is responsible for any damage caused by the product, and the manufacturer disclaims liability if the damage results from improper use or unauthorized manipulation of the product.

The manufacturer provides no warranty on the goods beyond the statutory warranty. In the event the customer exercises their rights arising from defective performance, they must submit a written notification of the defect, including a description of the defect and how it manifests, along with the goods, to the manufacturer no later than 14 days from the discovery of the defect, but in any case within the statutory period prescribed by law. In the case of a justified defect claim, the manufacturer shall assess the defect and, at the customer's discretion, either repair the goods, replace them, or refund the purchase price, or reject the claim if the defect is deemed unjustified. Mechanical damage to the gSim Converter or cables, damage caused by improper handling and use of the product by the customer, and any other damage caused by the customer, shall not be considered a defect. In the event the defect pertains to a software bug, the customer shall provide all necessary input files, intermediate files, configuration files, scenario descriptions, and defect descriptions to enable the manufacturer to reproduce and remedy the error.

The manufacturer undertakes to remove only defects that are technically removable.

All gSim products (software, hardware, supporting files, services), unless otherwise agreed in writing, are subject to these terms and conditions and governed by Czech law. Any disputes arising out of or in connection with this agreement shall be subject to the exclusive jurisdiction of the Czech courts.The gSim simulator is subject to the following License Agreement.

The supporting materials provided with the gSim software include certain third-party components, such as GNU Octave scripts for scenario generation, selected simulation scenarios, and reference satellite constellation data (GPS and Galileo), which are distributed under GPL v1 software license. These components are clearly marked and separated from proprietary parts of the gSim software (including the gSim GUI), which are subject to the gSim End User License Agreement.