1.5-Unit CubeSat structure


The ISIS 1.5-Unit CubeSat structure is developed as a generic, modular satellite structure based upon the CubeSat standard. The design created by ISIS allows for multiple mounting configurations, giving CubeSat developers maximum flexibility in their design process. The stack of PCBs and other flight modules can be build up first in the secondary structure and integrated with the load carrying frames at the end of the process, ensuring accessibility of the flight avionics. In addition, the use of a load carrying frame and detachable shear panels allows for access to all parts of the spacecraft avionics, even after final integration by removing one or more of the shear panels.

Availability: 8-12 weeks

  • Features
  • Product properties
  • Product options
  • Qualification and acceptance testing
  • Packaging
  • Documents/CAD


  • Highly modular design
  • Detachable side panels for maximum accessibility
  • Multiple PCB sizes supported
  • Dual Kill-switch mechanism
  • Scalable design to larger CubeSat form factors
  • Compatible with GomSpace, ClydeSpace and the most of CubeSatShop products

Product Properties

Value Unit
Primary Structure Mass 153.9 gram
Primary + Secondary Structure Mass 184.5 gram
Outside Envelope (l x w x h) 100 x 100 x 170.3 mm
Inside 1U Envelope (l x w x h) ~ 98.4 x 98.4 x 98.4 mm
Inside 0.5U Envelope (l x w x h) ~ 98.4 x 98.4 x 49.2 mm
Thermal Range (min – max) -40 to +80 °C

*Primary mass consists of SideFrames, Ribs and 2 KillSwitch mechanisms
Secondary mass includes the Stack Rods (Side Shear Panels not included)

Available Product Options

  • Different PCB form factors
    • PC/104 CubeSatKit compatible (Default)
    • 94 x 94 mm PCBs
    • Custom designs
  • Customized structural elements
    • Special mount points
    • Cut-outs
    • Special surface treatments
  • Different orientations of PCB stack
    • Vertical orientation (default)
    • Horizontal orientation (only featured for custom 94 x 94)

Qualification and Acceptance testing

Mechanical Shock
Thermal Cycling
Thermal Vacuum
Total Ionizing Dose

Flight Heritage: No ISIS 1.5-Unit CubeSat Structures have flown in space yet, however, multiple units are slated for a launch in the upcoming 12 months.

Packaging Information

  • Contents
    • Primary Structure parts (Side Frames, Ribs)
    • Secondary Structure parts (shear panels, PCB mounting elements)
    • Kill-Switch mechanism (2x)
    • Dummy PCBs
    • Fasteners
    • User Manual and installation Guide
  • Packaging
    • Boxed in transparent storage case