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https://gnsssimulator.com/  
As satellite-based positioning becomes deeply embedded in critical applications, evaluating device resilience against intentional or unintentional signal deception has become increasingly important. Modern GNSS spoofing simulators are designed to generate controlled and repeatable deceptive signals, enabling safe and reliable anti-spoofing testing.  
  
These systems can create spoofing signals for multiple navigation constellations and integrate seamlessly with radar, electro-optical sensors, or other detection mechanisms. Engineers can use these tools to evaluate how navigation receivers respond to signal manipulation attempts, helping uncover vulnerabilities long before deployment.  
  
Spoofing simulation technology is valuable not only for laboratory-based R&D but also for field-level verification, troubleshooting, and integration into larger electronic countermeasure platforms. Through standardized control interfaces, spoofing modules can operate as part of full deception-induction systems, providing a foundation for advanced navigation security research.  
  
With the growing sophistication of jamming and spoofing threats, pseudo range such simulation capabilities have become essential to maintaining the integrity and safety of modern navigation systems.