The Aerospace Corporation's DiskSat concept introduces a flat, disk-shaped small satellite bus designed to provide more power, surface area, and payload volume than a traditional CubeSat while keeping a standardized, containerized launch interface. A representative DiskSat demonstrator measures about 1 meter in diameter and roughly 2.5 centimeters thick, with an internal volume comparable to a 2 Los Angeles CA (SPX) Dec 17, 2025
The Aerospace Corporation's DiskSat concept introduces a flat, disk-shaped small satellite bus designed to provide more power, surface area, and payload volume than a traditional CubeSat while keeping a standardized, containerized launch interface. A representative DiskSat demonstrator measures about 1 meter in diameter and roughly 2.5 centimeters thick, with an internal volume comparable to a 20U CubeSat and structural mass under 3 kilograms.
NASA's Small Spacecraft and Distributed Systems program is funding the design and flight of a four-satellite DiskSat technology demonstration to validate the new form factor and its launch dispenser. For launch, multiple DiskSats are stacked inside a fully enclosed container that rides as a secondary payload and then deploys the spacecraft one at a time once on orbit, an approach aimed at supporting future constellations of up to 20 or more DiskSats in a single mission.
The large, continuous surface area of the DiskSat allows mounting more than 200 watts of solar cells without deployable arrays, supporting missions that require high power and large apertures for antennas or instruments. The flat layout also simplifies access to internal components during integration and test, while still accommodating standard CubeSat-class subsystems within the disk volume.
A key design feature is the ability to fly with one face continuously pointed toward Earth in a low-drag attitude, which, combined with electric propulsion, enables operations in very low Earth orbit below about 300 kilometers. This configuration is intended to offset atmospheric drag, extend mission lifetimes at low altitude, and support applications such as high-resolution Earth observation, low-latency communications, and space situational awareness while reducing long-term debris because satellites in these orbits naturally deorbit faster.
The DiskSat program positions the platform as a rideshare-compatible option for missions needing high power-to-mass ratio, flexible pointing, and rapid constellation deployment, and is being developed with an eye toward broader adoption by government, commercial, and academic users after the initial NASA-backed demonstration flight.
Related Links
The Aerospace Corporation DiskSat Program
Microsat News and Nanosat News at SpaceMart.com