Development Philosophy and Flight Results of Arc Event Generator and Investigation Satellite HORYU-IV

摘要

HORYU-IV is a lean satellite within an envelop of 450mm x 420mm x 430mm and weighs approximately 10kg. A lean satellite is a satellite that utilizes non-traditional, risk-taking development and management approaches - with the aim to provide value to the customer at low-cost and without taking much time to realize the satellite mission. HORYU-IV is dedicated to spacecraft charging and high voltage experiments which are not always welcomed as payloads on a shared platform due to concern over disturbance caused by discharge. Lean satellites are ideal testing platforms for those risky experiments. The HORYU-IV project started in Mary 2013 and the flight model was delivered to JAXA in January 2016. On February 17, 2016, it was successfully launched by a H-IIA rocket to an orbit of 575 km altitude with 31°. After initial check of the satellite house keeping data, the main mission was executed and the mission was successfully conducted. The overview of the satellite, especially its development philosophy as a lean satellite, will be given along with some preliminary flight results obtained during the eight months in orbit.