TimeSafe

GPS Vulnerability Assessment for Power Utilities

Identify timing risks before they disrupt your grid.

GPS timing is a single point of failure for the power grid

Jamming and spoofing threats are real — and the cost of inaction is measured in outages, mis‑operations, and regulatory risk.

Power substations depend on precise GPS timing for protection, control, and situational awareness. GPS signals are weak, vulnerable, and increasingly targeted. Without testing, utilities don’t know which assets will fail — or how fast.

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Proof: Expert‑Led, Controlled, Repeatable Testing

Purpose‑built assessments delivered by Safran GNSS security experts

Safran testing reveals how your actual devices behave when GPS timing is degraded, lost, or manipulated.

Expert‑led Testing

Designed and executed by Safran GNSS specialists with deep experience in interference and threat modeling

Industry‑proven Tools

Skydel GNSS Simulator for advanced jamming, spoofing, and combined attack scenarios
Safran GSG‑8 for highly accurate, multi‑constellation, repeatable signal generation

Controlled & Repeatable Scenarios

Evaluating systems within a non‑disruptive environment (typically lab‑based)

Real Equipment Under Test

Ensure your data is precise by testing on real equipment instead of relying on theoretical models.

The Cost of Doing Nothing

Unchecked GPS vulnerabilities expose utilities to:

Protection mis‑operations leading to equipment damage and outages
Loss of synchronization in PMUs and protection relays, degrading grid visibility
SCADA / EMS timing errors affecting alarms, event logs, and operator response
Extended restoration times due to unclear fault sequencing
Regulatory exposure as resilient PNT expectations increase

Undetected timing failure can cascade across substations — turning a local interference event into a system‑level disruption.

What You Get

Assessment Scope

Asset inventory and GPS dependency analysis
Threat modeling based on real‑world jamming and spoofing techniques
Custom test scenarios aligned to your operational environment

Deliverables

Comprehensive vulnerability assessment report
Quantified performance metrics (timing accuracy degradation, loss of sync, failover behavior)
Asset‑level findings (device models, versions, configurations impacted)
Actionable mitigation plan with prioritized recommendations

Timeline & Engagement

Planning and coordination with your engineering teams
Lab‑based testing using controlled scenarios
Review session with Safran SMEs to walk through findings and next steps

Use Cases: What Fails, How It Fails, and How to Fix It

	Protection Relays	PMUs (Phasor Measurement Units)	SCADA / EMS	Time Servers
Failure Mode	Loss or drift of time causes mis‑operations or delayed tripping	Phase angle errors and loss of synchrophasor integrity	Incorrect timestamps, alarm sequencing errors, degraded situational awareness	Propagation of corrupted or lost time across the substation or control center
Fix	Harden timing sources, improve holdover, implement anti‑jamming/spoofing measures	Validate timing performance under interference and define resilience thresholds	Identify tolerance limits and introduce resilient timing architectures	Harden reference sources and validate downstream behavior under attack scenarios

Compliance & Regulatory Context

Safran TimeSafe supports alignment with growing expectations around resilient timing:

Executive Order 13905 — Strengthening National Resilience through PNT
IEEE P1952 — Resilient PNT for power systems
DHS Resilient PNT Best Practices for critical infrastructure

Testing provides documented evidence of due diligence and proactive risk mitigation.

Schedule My Vulnerability Consult

Trusted worldwide for mission‑critical positioning, navigation, and timing solutions where system uptime cannot be compromised.

“Utilities don’t need theoretical risk models — they need to see how their equipment actually behaves under GPS attack. That’s what this assessment delivers.”
— Safran GNSS Security Expert

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