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Takeda N.,Space Engineering Development Co.
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010

"KIBO Hi-Vision EarthView" is a JSF lead Educational System enabling students, teachers, and the public to receive "live" high definition television (Hi-Vision) images from KIBO, nick name of Japanese Experimental Module (JEM) of International Space Station (ISS). We expect that Hi-Vision images will be distributed to young generations of not only Japan but also any other countries, especially Asian and US. Our system development is strongly supported by Japan Aerospace exploration Agency (JAXA) that planes to install 2 sets of Hi-Vision camera on KIBO's exposed facility in 2012. High school or Junior High school students request to take live images of specific locations around the world. The live Hi-Vision image viewing and accompanying learning guides are fantastic resources to study global environmental problems, natural disasters, Earth and space science, geography, geology, social study, culture, communications, and so on. Our project was started from December 2009 with project fund from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and we will complete system development by the end of March 2012. In this presentation, we would like to introduce our overall system architectures and how it works. Copyright ©2010 by the International Astronautical Federation. All rights reserved. Source


Isobe N.,Japan Aerospace Exploration Agency | Nakagawa T.,Japan Aerospace Exploration Agency | Okazaki S.,Japan Aerospace Exploration Agency | Sato Y.,Japan Aerospace Exploration Agency | And 11 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

The contamination control for the next-generation space infrared observatory SPICA is presented. The optical performance of instruments on space observatories are often degraded by particulate and/or molecular contamination. Therefore, the contamination control has a potential to produce a significant risk, and it should be investigated in the risk mitigation phase of the SPICA development. The requirements from contamination- sensitive components onborad SPICA, the telescope assembly and focal plane instruments, are summarized. Possible contamination sources inside and outside the SPICA spacecraft were investigated. Based on impact on the SPICA system design, the following contamination sources were extensively studied through simulation and measurement; (1) outgassing from the payload module surrounding the telescope mirror and focal plane instruments, (2) contamination due to the thruster plume, and (3) environmental contamination during the integration, storage and verification phases. Although the outgas from the payload module and the thruster plume were estimated to produce only a negligible influence, the environmental contamination was suggested to affect significantly the telescope and focal plane instruments. Reasonable countermeasures to reduce the environmental contamination were proposed, some of which were confirmed to be actually effective. © 2014 SPIE. Source


Takayama Y.,Japan National Institute of Information and Communications Technology | Toyoshima M.,Japan National Institute of Information and Communications Technology | Kura N.,Space Engineering Development Co.
Radioengineering | Year: 2010

The accessible probability of a low-orbit satellite from ground is estimated by using images taken by a eteorological satellite and by analyzing visible passes of the satellite. The study indicates that the ockage by clouds in satellite-ground laser communications is almost avoidable by properly distributing everal optical ground stations. For the calculation, we use an orbit information of a low-earth orbit atellite, the Optical Inter-orbit Communications Engineering Test Satellite (OICETS), as the counterpart of the optical ground stations. The calculation of the cumulative accessible probability shows the required time to achieve over 99% accessibility between the low orbit satellite and the optical ground stations. Source


Kiyoshi H.,Chubu University | Yui A.,IHI Corporation | Ines A.V.M.,Columbia University | Chinnachodteeranun R.,Listenfield Co. | And 4 more authors.
Annual SRII Global Conference, SRII | Year: 2014

We are developing an agricultural information service platform called Field Touch. More than 100 farmers in Hokkaido, Japan, are participating on this development and they are utilizing our services for optimizing their daily agricultural practices. Field Touch integrates multi-scale sensor data for field monitoring, provides functionality for recording agricultural practices, then supports farmers in decision making. We are updating Rapid eye satellite images every two weeks, and field sensor data from 25 nodes every 10 minutes. Data from national weather observation network, AMeDAS is also a data source at a daily basis. We use 'cloud Sense' sensor backend service that serves meta-data and data to Field Touch via standard web service, SOS (Sensor Observation Service), which brought us a great flexibility and automation in operating the system. We developed a successive simulation scheme as a part of Field Touch for evaluating the impact of climate variability and agricultural practices. © 2014 IEEE. Source


Narukage N.,Japan National Astronomical Observatory | Sakao T.,Japan Aerospace Exploration Agency | Kano R.,Japan National Astronomical Observatory | Hara H.,Japan National Astronomical Observatory | And 9 more authors.
Solar Physics | Year: 2011

The X-Ray Telescope (XRT) onboard the Hinode satellite is an X-ray imager that observes the solar corona with unprecedentedly high angular resolution (consistent with its 1″ pixel size). XRT has nine X-ray analysis filters with different temperature responses. One of the most significant scientific features of this telescope is its capability of diagnosing coronal temperatures from less than 1 MK to more than 10 MK, which has never been accomplished before. To make full use of this capability, accurate calibration of the coronal temperature response of XRT is indispensable and is presented in this article. The effect of on-orbit contamination is also taken into account in the calibration. On the basis of our calibration results, we review the coronal-temperature-diagnostic capability of XRT. © 2010 Springer Science+Business Media B.V. Source

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