Keeping GPS Free From Interference: An Interview with Lisa Dyer

Why It Matters

A GPS disruption could cripple supply chains, aviation safety, and national security, making resilience measures a strategic priority.

Key Takeaways

• GPS signals can be jammed or spoofed, threatening navigation
• GPSIA includes Apple, Garmin, Lockheed Martin, and other industry leaders
• Military GPS uses encrypted signals; commercial sector relies on unencrypted ones
• International bodies like ICAO can help standardize authentication measures
• Emerging tech aims to add authenticated signals for GPS resilience

Pulse Analysis

The global reliance on GPS extends far beyond consumer navigation; it underpins financial transaction timestamps, power‑grid synchronization, and precision agriculture. Recent incidents—such as a rogue jammer that briefly grounded flights at Denver International Airport and a New Jersey case where a driver concealed his route—illustrate how both intentional and accidental interference can cascade into safety and economic losses. As satellite signals travel from 12,000‑15,000 kilometers above Earth, their low‑power nature makes them especially susceptible to noise, jamming and spoofing, prompting urgent calls for protective measures.

The GPS Innovation Alliance (GPSIA) has emerged as a cross‑industry coalition to address these threats. With members ranging from Apple and Garmin to Lockheed Martin and Deere, the group advocates for a unified response that includes policy advocacy, technology standards, and public‑private partnerships. Dyer emphasizes that while the U.S. military enjoys encrypted, hardened signals, the bulk of commercial logistics—accounting for roughly 80% of defense transportation—relies on open civil signals. This creates a paradox: the very openness that fuels innovation also opens a vector for disruption, compelling GPSIA to push for an authenticated signal that can verify authenticity at the receiver level.

Looking ahead, the industry is exploring multiple layers of resilience. Satellite manufacturers are testing broadcast authentication, while aircraft and vehicle OEMs integrate anti‑jamming antennas and software filters. International forums such as the ICAO are poised to codify best practices, and the U.S. government’s formal acknowledgment of GPS interference would unlock funding for research and regulatory frameworks. For sectors that demand centimeter‑level accuracy—like precision farming and autonomous freight—the stakes are especially high, making the development of redundant, tamper‑proof positioning systems a critical frontier for both security and economic competitiveness.