Cute-1.7 + APD II Project - Sub Systems -

Small Satellite Program (SSP)

Laboratory for Space Systems (LSS), Tokyo Institute of Technology

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Top Subsystems

About subsystems

A satellite is composed of many different subsystems which all have a specific function. The EPS subsystem, which handles the regulation of internal power or the Communication subsystem, which handles the receiving and sending of data by the satellite, are two examples of the many sub-systems that compose a satellite.
But there are also external subsystems related to the launch and operation of the satellite and that must not be forgoten. The separation mechanism subsystem, in charge of ejecting the satellite from the rocket when at destination, the ground station subsystem, who enables the communication from the operation center with the satellite, without forgetting the book and documentation project are such external subsystems of a satellite project.

Detailed pages about the different subsystems

• C&DH(Command & Data Handling): Corresponding to the central computer of the satellite, it is in charge of many tasks such as orbit related calculation and data processing.
• Communication: In charge of enable radio link communications between the ground station and the satellite
• EPS: In charge of the satellite's power system, including batteries and solar cells
• ADCS: In charge of the satellite's attitude control as to be able to give any free position to the satellite
• Structure: In charge of the construction of the satellite's main structure.
• Camera: In charge of the development and implementation of the onboard camera
• APD: This sensor module subsystem was developed by a specific physics laboratory of this university
• Environment: As for the orbit and control of the satellite to be smooth, this subsystem studies and models the external conditions the satellite is confronted to.
• Separation: In charge of the separation mechanism of the Satellite from the launcher rocket.
• Ground Station: In charge of developping the system to control the satellite from the control and operation center.

Subsystems Block Diagram

Cute-1.7 + APD Sub System Block Diagram

*Classification of the different subsystems

Organization of the subsystems development teams

In the Cute-1.7 + APD II project, the groups responsible for each subsystems are composed of 1 or 2 persons in charge. General Integration Tests are periodically organized to detect the problems and progress forward the completion of the different tasks in the project.

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