Hodoyoshi-4 is a Japanese micro-satellite launched in 2014. The satellite is built in 0.5x0.6x0.7m box-shape bus, optimized for piggy-back launch.
All instruments are powered by solar cells mounted on the spacecraft body and two stub wings, with estimated electrical power of 50W.[1] For orbit-keeping, a "miniature" (5 kg dry weight) ion thruster with specific impulse of 1100 s and operating power of 20 W is integrated into the body.[2] The satellite was developed under the Funding Program for World-Leading Innovation R&D on Science and Technology.[3]
Hodoyoshi-4 was launched from Dombarovsky air base site 13, Russia, on 19 June 2014 by a Dnepr rocket. Two-side communication with Earth was successfully achieved at 2nd pass over ground station.
The satellite is intended primarily for technology verification in space, main test piece being Earth observation telescope with nominal 6.7m ground sample distance GSD at 650 km altitude.
Hiroshima, Japan, taken by Hodoyoshi-4 satelliteAlbert, France taken by Hodoyoshi-4 satelliteSpace Message Display System: Electronic Message Display & Observation WindowHosted Payload Box installed on Hodoyoshi-3 & Hodooyshi-4 satellites
Secondary mission is measurements of water level in rivers to monitor floods by using Store&Forward System.[5] Third mission is Hosted Payload. Hosted Payload mission consisted of 10 cm-cubic boxes on which users could install their own apparatuses for their own applications. Project members asked users in private partnership in order to explore new market of satellite utilization. One of the apparatuses was space message display system. Electronic message display was installed which operators could change characters on the display by sending commands from the ground station. Users can take photos of their messages with the view of the earth from the window.
^Koizumi, Hiroyuki; Komurasaki, Kimya; Arakawa, Yoshihiro (2012). "Development of the Miniature Ion Propulsion System for 50 kg Small Spacecraft". 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. doi:10.2514/6.2012-3949. ISBN978-1-60086-935-8.
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
This article about one or more spacecraft of Japan is a stub. You can help Wikipedia by expanding it.
