Space Force's Latest Pivot: GPS III SV-10 Swaps ULA Vulcan for SpaceX Falcon 9 as Rocket Woes Deepen

Key Takeaways

U.S. Space Force switches GPS III SV-09 launch from ULA’s Vulcan to SpaceX’s Falcon 9, targeting late April liftoff.
Vulcan experienced a solid rocket motor anomaly on February 12 during USSF-87 mission, prompting pause on all military launches.
This marks the fourth consecutive GPS III satellite moved from ULA to SpaceX.
Col. Ryan Hiserote highlights rapid GPS delivery, team flexibility, and commitment to reliable national launches amid Vulcan investigation.
SpaceX’s Falcon 9 reliability and high cadence make it the Pentagon’s preferred choice, aiding Elon Musk’s potential SpaceX IPO.
Space Force’s Rapid Response Trailblazer program enables seamless provider swaps, embedding SpaceX flexibility into security architecture.
Growing U.S. dependence on SpaceX for critical infrastructure like GPS and missile warning, posing risks with ULA’s existential challenges.

In a move that’s becoming all too familiar for the U.S. military’s space program, the U.S. Space Force has once again reassigned a critical GPS III satellite launch from United Launch Alliance’s (ULA) troubled Vulcan rocket to SpaceX’s battle-tested Falcon 9. This switch for GPS III Space Vehicle 10 (SV-10), dubbed “Hedy Lamarr,” targets a late April 2026 liftoff from Cape Canaveral Space Force Station’s Space Launch Complex 40 (SLC-40). ❶ ❷ ❸ This marks the fourth consecutive GPS III mission shifted to SpaceX, underscoring the Pentagon’s growing reliance on Elon Musk’s company amid ULA’s persistent delays and technical setbacks. ❸

As a space industry blogger with over a decade tracking launch providers, national security missions, and the high-stakes world of orbital infrastructure, I see this as a double-edged sword. On one hand, it highlights SpaceX’s unmatched reliability and rapid turnaround. On the other, it raises alarms about America’s launch ecosystem becoming overly dependent on a single player. Let’s dive deep into the anomaly that triggered this switch, the broader context, and what it means for U.S. space dominance.

The Vulcan Anomaly: What Went Wrong on USSF-87?

The catalyst for this reassignment was a concerning solid rocket motor (SRM) anomaly during ULA’s USSF-87 mission on February 12, 2026. Launched from Cape Canaveral, Vulcan Centaur successfully delivered two Geosynchronous Space Situational Awareness Program (GSSAP) satellites and an ESPA ring with research payloads to geosynchronous orbit. Despite the mission’s success, video footage revealed an anomalous plume from one of the rocket’s four Graphite-Epoxy Motor (GEM 63) solid rocket boosters early in ascent. ❹ ❺ ❻

ULA described it as an “observation early during flight,” but the U.S. Space Force wasn’t taking chances. By February 25, they paused all national security launches on Vulcan pending a full investigation. ❼ ❽ The SRMs, supplied by Northrop Grumman, have a history of issues—previous nozzle failures on ULA flights and ground tests have plagued the program. ❾ This isn’t Vulcan’s first hiccup; an earlier engine issue in 2024 grounded the fleet for months. ❿

Key Timeline of the Anomaly:

Feb 12, 2026: USSF-87 lifts off; SRM anomaly detected in initial boost phase.
Payload Delivery: Booster and Centaur V upper stage perform nominally; satellites reach target orbit.
Feb 24-25: Space Force initiates manifest review; pauses Vulcan NSSL missions.
March 2026: Ongoing probe leads to GPS SV-10 swap announcement.

Col. Ryan Hiserote, a key figure in Space Force’s Space Systems Command, emphasized the team’s “rapid GPS delivery, flexibility, and commitment to reliable national launches” during the investigation. ⓫ This flexibility is no accident—it’s baked into programs like the Space Force’s Rapid Response Trailblazer, which allows seamless provider swaps without derailing schedules.

A Pattern of Switches: Four GPS III Missions and Counting

This isn’t a one-off. GPS III SV-10 follows three prior reassignments:

SV-07, SV-08, SV-09: All traded from Vulcan to Falcon 9, with SV-09 (“Ellison Onizuka”) launching successfully on January 27, 2026—just two months after the swap decision. ⓬ ⓭ ⓮
SV-09 even carried NASA’s Laser Retroreflector Array (LRA), enhancing GPS precision by reflecting ground-based lasers for millimeter-accurate positioning. ⓯

These next-gen GPS satellites are vital: They boost signal strength by 8x, improve anti-jamming, and add M-code for secure military use. Delays here aren’t just inconvenient—they threaten navigation for troops, missiles, and civilian apps worldwide.

SpaceX Falcon 9: The Pentagon’s Go-To Workhorse

Why SpaceX? Simple: Reliability at scale. Falcon 9 boasts a 99%+ success rate across 400+ missions, with rapid reuse (boosters fly 20+ times) and high cadence (multiple launches weekly). ⓰ In FY2026, SpaceX snagged five of seven National Security Space Launch (NSSL) Phase 3 missions, plus nine more slated for late 2026. ⓱ ⓲

Recent highlights:

NROL-105 (Jan 2026): First national security launch of the year from Vandenberg. ⓳
Proven on classified spy sats and missile warning payloads.

This dominance isn’t just good for Space Force—it’s fueling speculation on a SpaceX IPO, as steady DoD contracts de-risk the business.

Pro Tip for Aspiring Space Enthusiasts: Track manifests on SpaceX’s site or NASASpaceFlight forums. Tools like Next Spaceflight app predict swaps based on Vulcan groundings.

ULA’s Uphill Battle: Delays, Backlogs, and Existential Risks

ULA’s Vulcan was meant to replace Atlas V, but it’s mired in troubles:

25+ DoD missions backlogged, many slipping due to pauses. ⓴
3-6+ month delays expected from SRM inspections.[21]
CEO Tory Bruno’s recent exit adds leadership uncertainty. ❽

Without Vulcan, ULA can’t compete on price or tempo. Amazon’s Kuiper constellation (tied to Vulcan) faces ripple delays.

The Double-Edged Sword: Over-Reliance on SpaceX

My Opinion: Competition drives innovation, but SpaceX’s ~80% market share for U.S. national security launches is risky. What if a Falcon 9 mishap grounds the fleet? Or geopolitical tensions hit Musk’s companies?

Risks Highlighted:

Single Point of Failure: GPS, missile warning, intel sats all SpaceX-dependent.
Supply Chain Vulnerabilities: ITAR restrictions limit alternatives.
IPO Distractions: Musk’s focus on Starship/Mars could strain Falcon ops.

Advice for Policymakers:

Accelerate Blue Origin New Glenn certification (target 2026, but delayed).
Fund Rocket Lab Neutron for medium-lift NSSL.
Enforce NSSL diversity: Award more to non-SpaceX for resilience.

Industry Insight: Space Force’s Trailblazer program is genius—pre-negotiated swaps embed flexibility. Expand it!

Looking Ahead: A Multi-Provider Future?

By late April, SV-10 should be in MEO, joining 30+ GPS III birds for full constellation refresh by 2030. SpaceX’s cadence will keep GPS humming, but ULA must fix Vulcan fast—or risk irrelevance.

Watch for: