Fundamental Technology Research Test and Verification in Space

The contents on this page are not current information due to JAXA's organization change on April 1, 2015. We will update them as soon as we can. Thanks for your understanding.

Space Technology Demonstration Research Center

The center performs research on manufacturing a micro-size engineering test satellite for 20 kg- to 100 kg-class satellites over a short period of time with low costs. For making a mid- to large-size satellite more functional and reliable application of devices and components with new technologies is imperative.
Micro-size engineering test satellites aim at testing and verifying newly developed devices and components in space in a timely manner. They are launched piggyback by capitalizing on the excess launch capability when a mid- to large-size payload is launched. We will make a series of micro-satellite launches to contribute to the reliability improvement of mid- to large-size satellites.

Activities of Space Technology Demonstration Research Center

Micro-satellite development over short period with low cost

By making a common bus for 50 kg- to 100 kg-class micro-satellites, the time and costs required for their development can be lowered.
We can accommodate mission requests such as an attitude control method (including spin-stabilizing, three-axis zero momentum) and a satellite size based on the available launch capability for piggybacks.

Space verification prior to applying to project


A micro engineering test satellite is regarded as a verification tool in space in a technical development cycle after preceding studies and prior to actually applying a new device or component whose prototype is tested for a project.

(*1) Preceding study, Feedback, Operation, Practical satellite, Prototype/test, Space verification, Micro-satellite, Project application

Human Resource Development

JAXA utilizes a micro-satellite project for human resource development by conducting such a project in house and allowing JAXA employees to lead such a project from its designing phase to operation phase.

Research contents

100 kg-class micro engineering test satellite

The small Demonstration Satellite-1 (SDS-1) was launched as a secondary satellite of the main payload, GOSAT with other small satellites on January 23, 2009. The SDS-1 is equipped with the following three major mission instruments.

  • Multi-mode integrated transponder (MTP)
  • Space wire demonstration module (SWIM)
  • Advanced microprocessor in-orbit experiment equipment (AMI)

* After completing its regular operation phase and post-operation phase, the SDS-1 stopped its data link to the ground on Sep. 8, 2010.

50 kg-class micro engineering test satellite

The Small Demonstration Satellite-4 (SDS-4) is a 50 cm x 50 cm box-shaped satellite with the following mission instruments onboard. It was launched as a secondary payload of the GCOM-W1 on May 18, 2012. Other 50 kg-class satellites are the Micro-Labsat launched in December 2002, and SOHLA-1 launched in January 2009, developed through technological transfers to Astro Technology SOHLA as part of collaborative activity of industry and academia. The SDS-4 is a 50 kg-class three-axis stabilization satellite applying technologies verified by the above 50 kg-class satellites and SDS-1.

  • Space based Automatic Identification System Experiment (SPAISE)
  • Flat Heat Pipe (FHP) On-orbit Experiment (FOX)
  • In-flight experiment of space materials using THERME (IST)
  • Quartz Crystal Microbalance (QCM)

SDS-4 (Imaginary drawing)