Introduction of Research

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Leading Research for Future
Satellite design innovations

We have been researching novel technologies that enable innovative satellite design that keeps Japan's satellites firmly ahead of the competition on the world scene.

One of our more challenging research topics in the satellite design innovations is a wireless technology that makes it possible to transfer data or power among satellite systems without cables. Internal wireless links are expected to create a new paradigm in satellite design and test processes. We have been striving to mature crucial wireless technologies for optimizing satellite system designs.

The other is a research related to the synthetic aperture radars (SARs) that have been equipped on Japanese Earth Observation Satellites "Fuyo-1" (JERS-1), "Daichi" (ALOS) and "Daichi-2" (ALOS). We have taken steady steps to improve JAXA's SAR capabilities and then propose innovative satellite systems by establishing onboard data process and appropriate information extraction technologies.



The Value of Our Research

Wireless Technologies

By using wireless technology for communication and power transmission between devices, we aim to eliminate a lot of cables and connectors in the satellite. We expect wireless technology will allow for the low-cost and short-term development of the satellite.


SAR onboard data process technologies

The SAR onboard data process technologies realize autonomous capabilities and particularly onboard data processing capabilities of identifying natural and artificial objects and accessing information from huge volume of collected earth observation data. The SAR, which operates both day and night, is thought to hold promise as a technique for searching and identifying artificial objects such as marine ships and crashed aircraft. At present, it takes more than half a day to provide final products to end users. Our research would shorten the time to provide the information to users by enabling rapid onboard digital processing of observation data, extraction of \ information that users need, and the rapid downlink of data products compressed to the lowest possible volumes.



Research Goals

Wireless Technologies
  1. Wireless satellite health monitoring
    To develop a wireless sensor composed of a microwave power transmission chip and an ultra-low-power communication chip stacked on each other and establish Wireless Sensor Network which will monitor temperature in thermal vacuum tests.
  2. Wireless communication network among satellite-equipment
    To construct an intra-satellite network using I/F modules to connect satellite subsystems wirelessly.
  3. Wireless power charge in a satellite
    To realize the wireless electricity transmission in a satellite with a power of 1 kW or more at an efficiency higher than 90%.

SAR onboard data process technologies

Our goal is to develop the onboard SAR data processor with high-performance parallel processing hardware and an algorithm to sort out user required information from SAR data in near real-time.



合成開口レーダ衛生の観測性能とデータレート