What it is and the problem it solves
The CubeSat is a standardised physical and mechanical interface for small satellites. It solves the problem of fragmented, custom-built small satellite integration into launch vehicles. The CubeSat specifications were developed in 1999 by Puig-Suari and Twiggs to promote educational development of small satellite design, manufacture, and testing for LEO.
How it works
The CubeSat standard defines a physical unit: 10×10×11.35 cm, ≤2 kg, with 1 L usable volume. It specifies mechanical, electrical, and operational requirements — including the launch vehicle interface, survival conditions, and deployment mechanism. The standardization effort culminated in the publication of ISO 17770:2017 in 2017.
What works
The standard enables predictable mechanical fit, repeatable deployment, and shared test protocols across universities, startups, and agencies. Its emergence — not top-down mandate — gave it legitimacy and broad adoption. Cal Poly published the CubeSat standard under the leadership of Jordi Puig-Suari.
What does not
It does not accommodate non-conforming designs like MEPSI. It does not define on-orbit performance, power generation, data throughput, or mission lifetime. It does not govern software, autonomy, or regulatory licensing.
What it changes
It changes how small satellites interface with launch providers. It shifts cost and risk from launch integration to payload design. It enables batch manufacturing and shared launch economics — but only for conforming units.
Is it worth your time
Yes — if your work involves small satellite integration, launch procurement, or educational hardware development. No — if you need custom form factors, higher mass tolerance, or non-LEO deployment paths.
