How Rockets Catch Up to Satellites Faster Using Out-of-Plane Steering

A method for launching rockets to reach a space station or satellite in less than one full orbit by steering the rocket sideways during launch.

What it covers

This patent describes a way to launch a spacecraft so it meets a target, like the International Space Station, in less than one full orbit. Normally, rockets launch into a specific path that takes a long time to align with a target. This method uses 'out-of-plane' steering—essentially steering the rocket sideways relative to its initial path—to adjust its trajectory while it is still climbing. By timing the launch to hit a specific 'phase angle' (the relative position of the rocket and target), the rocket can reach the target's 'rendezvous envelope' before the target has even finished one trip around the Earth.

What it doesn't cover

• —Does not cover rendezvous methods that take more than one full orbit to complete.
• —Does not cover launch systems that do not use out-of-plane steering to adjust the orbital plane.
• —Does not cover rendezvous with targets that are not in an orbital plane offset from the launch site.
• —Does not cover manual piloting; it specifically requires a processor-based control unit.

The clever bit

The innovation is using the launch vehicle's steering during the ascent phase to actively correct the orbital plane, rather than waiting to perform complex maneuvers once in orbit.

Why it matters

Reducing the time it takes to reach a space station is critical for cargo and crew missions. Faster rendezvous reduces the amount of time astronauts spend in cramped capsules and allows for more frequent, efficient resupply missions. This technology is a key part of modernizing how we access low Earth orbit.

Real-world examples

• 1.United Launch Alliance Vulcan Centaur missions
• 2.International Space Station cargo resupply missions
• 3.Rapid orbital rendezvous maneuvers