""As a result, extensive and more operationally relevant testing with actual GPS satellites, ground antennas, and user equipment led to an increase in finding extensive system issues across all subsystems, many of which have not been resolved.""
""For over 15 years, the program has experienced significant technical challenges, schedule slips, and associated cost growth, putting at risk the launch and capability of future GPS satellites.""
""Jamming (denial of signal) and spoofing (false signals) are a current and growing threat to GPS. We are modernizing GPS to mitigate these threats.""
The GPS program has faced significant technical challenges and delays over 15 years, leading to cost growth and jeopardizing future satellite launches. The OCX program's delays necessitated the military's reliance on an outdated control system for GPS III satellites. Upgrades in 2020 enabled the Space Force to utilize new military-grade M-code signals, which are resistant to jamming and spoofing. This modernization is crucial for maintaining operational advantages in conflict zones, as GPS networks are increasingly targeted by adversaries.
Read at Ars Technica
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