|Units or mass||10 kg|
|Status||Operational? (Last SatNOGS report 2019-05-25, but data is suspicious. Checked 2019-05-25)|
|Organisation||Kyushu Institute of Technology|
|Entity||Academic / Education|
|Launch brokerer||JAXA, ?|
Test experimental high-voltage solar array and observing corresponding spacecraft charging effects on the satellite.
Horyu-4 is testing an experimental high-voltage solar array system and observing corresponding spacecraft charging effects on the satellite caused by the high voltage. The mission of Horyu-4 is to: acquire current waveform of arcing phenomena on high voltage solar array. Acquire image of arcing phenomena on high voltage solar array. Advance our knowledge on spacecraft charging. Contribute to reliability improvement of present space systems and realization of future high power space system.