The COSTR CubeSat Structure is a standard CubeSat structure based on modular concept design. The COSTR CubeSat structure uses the standard U (the envelope of 1U is 10cm × 10cm × 10cm) as the unit and can provide 1U~16U structures. The COSTR CubeSat structure is compatible with the "CubeSat Design Specification" published by Cal Poly SLO. It could install various types of CubeSat subsystems and has strong adaptability to the platform.

The COSTR CubeSat Structure provides several built-in separation switches to ensure that the CubeSat structure is powered off before launch and can configure side panels according to the customer's requirements. The COSTR CubeSat Structures are shown in Fig. 

The design of COSTR is based on the international standard of CubeSat;

The COSTR CubeSat Structure uses high-strength aluminum alloy 7075/high-strength lightweight magnesium-lithium alloy;

All screws are non-magnetic, high-strength, corrosion-resistant titanium alloy screws;

Hard anodizing is used in the surface treatment;