Get ready to witness a groundbreaking leap in satellite technology! The U.S. Space Force and NASA are teaming up to launch an experiment that could redefine how we operate in space, particularly in the challenging environment of very low Earth orbit (VLEO). But here's where it gets controversial: Can a flat, disk-shaped satellite really outperform the tried-and-true cubesat design? Let’s dive in.
Later this week, Rocket Lab is set to launch four innovative satellites, dubbed DiskSats, aboard its Electron rocket from Wallops Island, Virginia. Scheduled for no earlier than midnight Eastern on December 18, this mission, designated STP-S30, was fast-tracked from its original spring 2026 target. The goal? To test a new small-satellite architecture designed to thrive in VLEO, a region where atmospheric drag typically spells doom for satellites within weeks.
Here’s the part most people miss: DiskSats aren’t just another satellite design—they’re a bold reimagining of what’s possible. Developed by Aerospace Corp. with NASA funding, these flat, plate-like satellites are roughly three feet in diameter and optimized to minimize drag as they glide through the upper atmosphere. Their unique shape provides more surface area than traditional cubesats, allowing for greater power generation (up to 100 watts via solar cells) and more space for instruments. This design isn’t just a tweak—it’s a potential game-changer for missions that cubesats can’t handle.
The mission has dual objectives: first, to demonstrate the DiskSat’s ability to maneuver across multiple orbital regimes, including VLEO, and second, to showcase its utility for communications and space environment sensing. Secondary payloads will support these experiments, adding layers of complexity and potential applications. The Space Force, which awarded Rocket Lab a $14.4 million contract for this mission, is providing launch and on-orbit operations support under an agreement with NASA.
But why VLEO? Operating below 300 kilometers is no walk in the park. Satellites here face intense atmospheric drag, which rapidly decays their orbits. Yet, VLEO offers tantalizing benefits: higher-resolution Earth imaging, improved remote sensing signals, and lower-latency communications. DiskSats aim to tackle this challenge head-on by combining their low-drag design with high-efficiency electric propulsion to counteract orbital decay. If successful, this could unlock a new frontier for both defense and commercial satellite constellations.
Rocket Lab’s Electron rocket will deploy the four DiskSats into a circular orbit at about 550 kilometers. From there, Aerospace Corp. will test their maneuverability, the dispenser mechanism, and their ability to change orbits using electric propulsion. The results could shape the future of satellite operations in a region that has long been considered too hostile for sustained missions.
Here’s the controversial question: If DiskSats prove successful, could they render cubesats obsolete for certain missions? Or will cubesats remain the go-to standard? Let us know your thoughts in the comments below. This experiment isn’t just about launching satellites—it’s about challenging the status quo and pushing the boundaries of what’s possible in space.
