Those attending WSTS are fully aware of the growing RF and cyber threats to GNSS. A world in which GNSS is routinely degraded, disrupted, deceived, or denied impacts critical infrastructure owners and operators across multiple sectors and seriously affects nearly every country’s national defense. This presentation will look at the performance of a complementary PNT service from low-Earth orbit (LEO) in an environment where GNSS has been intentionally compromised. Specifically, this briefing will focus on how the LEO PNT service from Iridium performed during deliberate GNSS attacks (e.g., jamming, spoofing, meaconing, etc.) at Jammertest 2025 in Andøya, Norway. Results from multiple test scenarios will be presented: static timing dynamic timing (i.e., timing on the move) Performance parameters of the LEO PNT service (e.g., signal strength, burst rate, number of satellites in view, etc.) will be presented along with various performance comparisons against signals from GPS and other GNSS. The data will show how a space-based complementary PNT service from LEO can continue to provide an accurate and stable source of time for timing sync applications when GNSS signals are impaired, falsified, or disabled.