LINK's $30 Million Grab at Swift
Why Swift Is Falling
Swift is not falling because it broke. It is falling because the sun had an active few years. The Neil Gehrels Swift Observatory launched in 2004 into an orbit around 600 km up, high enough that the thin wisp of atmosphere up there barely touches a spacecraft. But that wisp is not constant. It swells and shrinks on an eleven-year solar cycle: a more active sun heats the upper atmosphere and puffs it up, pushing it higher than usual. During the 2024-25 solar maximum, the peak stretch of that cycle when the sun is throwing off the most energy, the swelling reached further out than it normally does. That is bad news for Swift in particular, because the telescope has no thrusters of its own to push back against the added drag. It has simply bled altitude, dropping to roughly 340 km, and NASA now models a real chance it will fall out of control before the year is out. That is the deadline LINK is racing: its robotic arms need to dock with Swift before NASA's own models say the telescope tumbles back into the atmosphere uncontrolled.
The Real Experiment
The interesting science here is not really the telescope. It is the contract. NASA gave the company Katalyst a fixed-price award under its Small Business Innovation Research program: Katalyst gets a set amount up front and eats any cost overrun itself. That is the opposite of the cost-plus deals that govern most prime-contractor spaceflight, where NASA absorbs the overruns instead. Swap who holds the risk, and you change the incentives, and that shift is a big part of why Katalyst built and tested a docking-capable spacecraft in about eight months, against the industry's usual two years. The spacecraft, called LINK, carries three robotic arms fitted with lidar, a laser-based system for judging distance that is the same basic tech self-driving cars use to sense obstacles, plus three-axis grippers, and xenon Hall-effect thrusters, an efficient form of electric propulsion, for the approach. Katalyst's own timeline runs three to four weeks of slow, thruster-powered closing in on Swift, then two to three weeks scanning the telescope's hull for a spot its arms can actually lock onto. That second step matters because Swift was never built to be grabbed by another spacecraft. It has no handle, no fixture designed for this. After that comes two to three months of reboost burns to nudge the telescope back to a safer altitude. But everything downstream depends on one moment: the arms either find a grip on that first pass, or the mission fails.
Swift cost roughly $500 million to build. LINK cost $30 million to save it, about six percent of the original price. If the arms close on Swift's hull, insurers and satellite fleet operators get something they do not have today: a working template for patching up an aging satellite instead of writing it off. If the arms miss, NASA and Katalyst will have spent $30 million learning that grabbing a satellite that was never built to be grabbed needs a different approach, and the next satellite they try this on may be sitting in a busier orbit with no room for a failed first attempt.