GPS Is 50. It's Also Broken.

GPS is 50 years old, and it shows. The signals were designed for a world where the biggest threat to navigation was accidental interference, not deliberate jamming. They are weak, unencrypted, and easily disrupted — problems that military users have complained about for years without anything changing. Xona Space Systems thinks the economics of satellite navigation have finally shifted enough to build an alternative. On March 26, the company announced it raised $170 million in a Series C funding round led by Mohari Ventures Natural Capital, with participation from Craft Ventures, ICONIQ, Woven Capital, NGP Capital, Samsung Next, and Hexagon, to deploy a constellation of 258 satellites in low Earth orbit.

Xona approach differs from GPS in three ways that matter. First, the satellites orbit in low Earth orbit instead of GPS 20,200-kilometer medium Earth orbit — which means the signals arrive stronger and are harder to jam close to the source. Second, the company shifted from C-band to L-band frequencies — the same band GPS uses — after determining that most potential users do not have receivers capable of picking up C-band. That decision was commercial, not technical: as Brian Manning, Xona co-founder and chief executive, told SpaceNews, compatibility with existing user equipment was critical to scaling. You cannot ask logistics companies, drone operators, or autonomous vehicle developers to replace every receiver in their fleet just to try your service. Third, the economics are theoretically in a different league. Xona claims its full constellation could be built for roughly what it costs to replace a single GPS satellite currently in orbit — though currently in orbit is doing a lot of work in that comparison, given that GPS satellites are bespoke government assets built to military specifications, not commercially produced.

The company first production-class satellite launched in June 2025. More than a dozen commercial receiver manufacturers — including Japan Furuno and positioning specialist Topcon — are already tracking its signals, according to SpaceNews. Two more Xona satellites built in-house at the company Burlingame, California, facility are scheduled to launch on a SpaceX rideshare in the fourth quarter of 2026, alongside four more built by Belgian manufacturer Aerospacelab. Xona is also establishing a London office to support European customers and growing its Montreal operations to tap aerospace engineering talent.

The commercial reception is notable. Receiver manufacturers do not waste time tracking satellites that are not going to matter. That said, tracking a single satellite and operating a 258-satellite constellation are different problems. The gap between partners are watching and service is certified and reliable across the full network is where most space infrastructure companies find out whether their economics actually work.

Xona has also secured a Strategic Funding Increase (STRATFI) agreement with the U.S. Space Force, combining $20 million in government funding with $30 million in private capital. The STRATFI model is explicitly designed to bridge defense needs and commercial markets — the government gets access to a capability it wants without funding the entire buildout, and the company gets a credible early customer and capital at below-market rates. Manning said the current administration is very much looking at commercial PNT capabilities, which is a less guarded way of saying what STRATFI already implies: the government wants options beyond GPS and is not interested in funding them as a sovereign program.

The accuracy question is where things get harder to evaluate. Xona investor materials cite centimeter-level positioning accuracy, roughly 50 to 100 times more precise than standard GPS, as the system native capability. Whether Xona is actually delivering that accuracy in the field is a different question. A constellation designed for it and a constellation that has demonstrated it across a representative user base are not the same thing.

What is genuinely different about this story is not the funding — $170 million is serious money but not extraordinary in the context of LEO infrastructure — but the strategic framing. GPS was built as a military system that the U.S. government gave away for free. The question the PNT world has been quietly asking for a decade is whether that model still makes sense when the threats are real, the user base is global, and the commercial market for positioning data is worth billions annually. Xona bet is that the answer is no, and that the cost curve for LEO satellites has crossed the threshold where a commercial replacement is economically viable. The STRATFI suggests the government is making the same bet from the other side.

The real test is the next six satellites. If they demonstrate the same signal quality and receiver compatibility in orbit, Xona moves from interesting demo to system with a credible path to service. If they slip into 2027, or if the in-house manufacturing line produces hardware with different performance characteristics than the Aerospacelab units, the timeline gets harder to defend. Clock speed matters in infrastructure. GPS did not get replaced — it got old.