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1. Fabrication and Analysis of Three-Layer All-Silicon Interference Optical Filter with Sub-Wavelength Structure toward High Performance Terahertz Optics

Author

Makitsubo, Hironobu, Wada, Takehiko, Kataza, Hirokazu, Mita, Makoto, Suzuki, Toyoaki, and Yamamoto, Keita

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

We propose an all-silicon multi-layer interference filter composed solely of silicon with sub-wavelength structure (SWS) in order to realize high performance optical filters operating in the THz frequency region with robustness against cryogenic thermal cycling and mechanical damage. We demonstrate fabrication of a three-layer prototype using well-established common micro-electro-mechanical systems (MEMS) technologies as a first step toward developing practical filters. The measured transmittance of the three-layer filter agrees well with the theoretical transmittances calculated by a simple thin-film calculation with effective refractive indices as well as a rigorous coupled-wave analysis simulation. We experimentally show that SWS layers can work as homogeneous thin-film interference layers with effective refractive indices even if there are multiple SWS layers in a filter., Comment: Accepted for publication in J Infrared Milli Terahz Waves. The final publication will be available at Springer via http://dx.doi.org/10.1007/s10762-016-0328-z

Published
2016
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2. A Report on the MEMS-IRU Development results

Author

MITA, Makoto, SAKAI, Shinichiro, FUKUDA, Seisuke, YOSHIDA, Yukihisa, ICHIMURA, Satoshi, SUZUKI, Karebu, and NAKAO, Hotaka

Subjects
MEMS-IRU, MEMS Gyroscope
Abstract

本報告ではMEMS(Micro Electro Mechanical Systems) ジャイロスコープを用いた小型で高性能なMEMS-IRU(Inertial Reference Unit: 慣性基準装置) の開発結果に関して述べる。近年衛星の小型・高性能化の潮流により搭載する機器も小型化、高性能化が求められている。小型の衛星や探査機で使用される中精度の小型IRU（Inertial Reference Unit: 慣性基準装置）は、姿勢制御に必須な航法センサであり、衛星や探査機の姿勢決定精度などの性能を決める機器である。IRU は必須の機器でありながら、現状は米国製等の光ファイバジャイロに依存し国際情勢によっては入手性等に課題が生じる場合がある。これに対し、宇宙とは別用途でMEMSジャイロの技術を保有している企業に対し、宇宙科学研究所の技術的知見を投入し、衛星や探査機用途に必要な長時間のバイアス安定性などの特性をもつMEMS ジャイロの戦略的開発研究（工学委員会）を実施してきた。本開発では、このMEMS ジャイロ用いた小型軽量で低消費電力な国産IRU の開発い、米国製FOG との比較で同等の性能を維持しつつ、民生技術などを活用し、体積・質量は1/2、消費電力は1/3 を実現した。, This report describes the development of a compact Inertial Reference Unit (IRU) using MEMS technology. By using MEMS technology, an IRU used for attitude control of satellites and probes could be made half the size and mass and one-third the power consumption of a small FOG, while maintaining the same performance as a small FOG. We fabricated a MEMS-IRU EM equivalent and conducted performance and environmentaltests. As a result, we confirmed that the small IRU has the accuracy to be used in small satellites and probes. Furthermore, we have already decided on a project to install the IRU on a small satellite or probe., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA2230022000, レポート番号: JAXA-RM-22-007

Published
2023

3. Release-type experimental platform demonstration

Author

MITA, Makoto

Subjects
Ethernet, MEMS, Sounding Rocket, Wi-Fi, Sensor
Abstract

第5回観測ロケットシンポジウム(2023年2月28日-3月1日. オンライン開催), 5th Sounding Rocket Symposium(February 28-March 1, 2023. Online Meeting), 資料番号: SA6000185014, レポート番号: Ⅱ-5

Published
2023

4. Exploration of energization and radiation in geospace (ERG): challenges, development, and operation of satellite systems

Author

Nakamura, Yosuke, Fukuda, Seisuke, Shibano, Yasuko, Ogawa, Hiroyuki, Sakai, Shin-ichiro, Shimizu, Shigehito, Soken, Ersin, Miyazawa, Yu, Toyota, Hiroyuki, Kukita, Akio, Maru, Yusuke, Nakatsuka, Junichi, Sakai, Tomohiko, Takeuchi, Shinsuke, Maki, Kenichiro, Mita, Makoto, Ogawa, Emiko, Kakehashi, Yuya, Nitta, Kumi, Asamura, Kazushi, Takashima, Takeshi, and Shinohara, Iku

Published
2018
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5. The ARASE (ERG) magnetic field investigation

Author

Matsuoka, Ayako, Teramoto, Mariko, Nomura, Reiko, Nosé, Masahito, Fujimoto, Akiko, Tanaka, Yoshimasa, Shinohara, Manabu, Nagatsuma, Tsutomu, Shiokawa, Kazuo, Obana, Yuki, Miyoshi, Yoshizumi, Mita, Makoto, Takashima, Takeshi, and Shinohara, Iku

Published
2018
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7. A Report on the Plan and Result of S-310-45 ISAS/JAXA Sounding Rocket Mission

Author

FUKUSHIMA, Yosuke and MITA, Makoto

Subjects
Free-Flying Probe, JAXA Sounding Rocket, Inertial Platform
Abstract

観測ロケットS-310-45号機の実験計画および実験結果について報告する．本実験では，今後の観測ロケットの利用対象を拡大することを目的とし，ロケット搭載の慣性プラットフォームおよび分離式浮遊プローブの実証実験を実施した．これらの実験装置について，実験計画と製造および試験について，そしてフライトによって得られた実験結果について報告している．慣性プラットフォームは一部予定していた実験データを取得することができなかったが，慣性プラットフォームの機械構造を上空で動作させて基礎的なデータを取得することができ，装置についての原理検証および製造方針についての飛翔実証を実施することができた．一方プローブ実験においてはロケットから分離し，分離後の運動データを取得することができた．また，実験中の全休画像取得にも成功し，宇宙で動作している観測ロケットの広視界の鮮明な画像を取得できた．これらについて，計画段階，試験段階，そしれ実験結果についてをまとめて紹介している．, This report describes the plan and result of S-310-45 mission using ISAS/JAXA sounding rocket. The experiment was performed on 9th January 2020 as planned without any major problems. The purpose of this mission is to demonstrate the newly proposed onboard apparatus for the sounding rocket in order to enlarge the field of researchers who are thinking of using the sounding rocket for their purposes. The authors have been proposed two approaching ways: one is to use an inertial perform mechanism for its attitude stabilization, and the other is to detach necessary user-equipment from the rocket to get way from disturbance of mechanical and electro magnetic interference sourcing from the rocket body. Both onboard equipment successfully transmitted the data to show their onboard performance and to evaluate them., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA2030014000, レポート番号: JAXA-RM-20-002

Published
2021

8. Small satellite REIMEI for auroral observations

Author

Saito, Hirobumi, Hirahara, Masafumi, Mizuno, Takahide, Fukuda, Seisuke, Fukushima, Yousuke, Asamura, Kazushi, Nagamatsu, Hiroyuki, Tanaka, Koji, Sone, Yoshitsugu, Okuizumi, Nobukatsu, Mita, Makoto, Uno, Masatoshi, Yanagawa, Yoshimitsu, Takahara, Takuya, Kaneda, Ryosuke, Honma, Takashi, Sakanoi, Takeshi, Miura, Akira, Ikenaga, Toshinori, Ogawa, Keita, and Masumoto, Yasunari

Published
2011
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12. Effect of Replanting Zinnia Plants for Remediation of Oil-Contaminated Soil

Author

Mita Makoto, Ikeura Hiromi, Kai Takamitsu, and Tamaki Masahiko

Subjects
Environmental sciences, GE1-350
Abstract

Previously, we demonstrated that the zinnia plant was effective for the phytoremediation of oil-contaminated soils and that it had a higher remediation effect during the initial growth period. Therefore, repeated planting of zinnia for the initial growth period might enhance the remediation of contaminated soils, so we performed the following study. Seeds were sown in soils containing 4% (w/w) diesel oil and grown for 100 days. We carried out two treatments: replanted plots where above-ground parts of plants were cut after 50 days, and new seeds were sown; or non-replanted plots where plants were allowed to grow for 100 days. The soil dehydrogenase activity and soil total petroleum hydrocarbon concentrations were analyzed. At the end of the study, no significant differences were found between replanted and non-replanted plots for either measurement. Therefore, replanting did not affect remediation. Degradable oil components in the soils may have been degraded in the initial growth period of the first planting, but by the time of replanting there may have been few degradable oil components left in the soil, so there was no beneficial effect of replanting. We concluded that replanting is unsuitable for phytoremediation of oil-contaminated soils.

Published
2018
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13. S-310-45 号機の結果報告

Author

FUKUSHIMA, Yosuke and MITA, Makoto

Abstract

第3回観測ロケットシンポジウム（2021年3月24-25日. オンライン開催), 3rd Sounding Rocket Symposium (March 24-25, 2021. Online Meeting), PDF再処理の為、2023年3月17日に差替, 資料番号: SA6000162014, レポート番号: Ⅳ-1

Published
2021

15. Evaluation of the soft x-ray reflectivity of micropore optics using anisotropic wet etching of silicon wafers

Author

Mitsuishi, Ikuyuki, Ezoe, Yuichiro, Koshiishi, Masaki, Mita, Makoto, Maeda, Yoshitomo, Yamasaki, Noriko Y., Mitsuda, Kazuhisa, Shirata, Takayuki, Hayashi, Takayuki, Takano, Takayuki, and Maeda, Ryutaro

Subjects
Anisotropy -- Research, X-rays -- Optical properties, Reflectance -- Evaluation, Semiconductor wafers -- Optical properties, Semiconductor wafers -- Production processes, Astronomy, Physics
Abstract

The x-ray reflectivity of an ultralightweight and low-cost x-ray optic using anisotropic wet etching of Si (110) wafers is evaluated at two energies, C [K.sub.[alpha]] 0.28 keV and Al[K.sub.[alpha]] 1.49 keV. The obtained reflectivities at both energies are not represented by a simple planar mirror model considering surface roughness. Hence, an geometrical occultation effect due to step structures upon the etched mirror surface is taken into account. Then, the reflectivities are represented by the theoretical model. The estimated surface roughness at C [K.sub.[alpha]] (~6 nm rms) is significantly larger than ~1 nm at Al [K.sub.[alpha]]. This can be explained by different coherent lengths at two energies. [c] 2010 Optical Society of America OCIS codes: 340.7470, 350.1260, 220.4000, 170.3890.

Published
2010

17. 小型SAR実証衛星1号機: -StriX α-の開発

Author

TANAKA, Koji, OBATA, Toshihiro, FUJIHIRA, Koichi, SAITO, Hirobumi, MITA, Makoto, ARISAKA, Ichitaro, and IJICHI, Koichi

Abstract

第21回宇宙科学シンポジウム (2021年1月6日-7日. オンライン開催), 21st Space Science Symposium (January 6-7, 2021. Online Meeting), 資料番号: SA6000163203, レポート番号: Pc.12

Published
2021

19. 地球磁気圏X線撮像計画 GEO-X

Author

GEO-Xチーム, EZOE, Yuichiro, FUNASE, Ryu, NAGATA, Harunori, MIYOSHI, Yoshizumi, KASAHARA, Minoru, NAKAJIMA, Hiroshi, MITSUISHI, Ikuyuki, ISHIKAWA, Kumi, HIRAGA, Junko, MITSUDA, Kazuhisa, FUJIMOTO, Masaki, UENO, Munetaka, YAMAZAKi, Atsushi, HASEGAWA, Hiroshi, MATSUMOTO, Yosuke, KAWAKATSU, Yasuhiro, IWATA, Takahiro, MITA, Makoto, MITANI, Takefumi, KAWABATA, Yosuke, OZAKI, Naoya, NAKAJIMA, Shintaro, SAHARA, Hironori, KANAMORI, Yosiaki, MORISHITA, Kohei, and GEO-X Team

Abstract

第21回宇宙科学シンポジウム (2021年1月6日-7日. オンライン開催), 21st Space Science Symposium (January 6-7, 2021. Online Meeting), 著者人数: 27名ほか, 資料番号: SA6000163178, レポート番号: Pb.04

Published
2021

20. Lightwave antenna with a small aperture manufactured using MEMS processing technology

Author

Munemasa, Yasushi, Mita, Makoto, Takano, Tadashi, and Sano, Masatoshi

Subjects
Microelectromechanical systems -- Methods, Antennas (Electronics) -- Properties, Business, Computers, Electronics, Electronics and electrical industries
Abstract

High-performance antennas at lightwave frequency require optimal curved surfaces and high mechanical precision in order to realize high aperture efficiencies. We have developed a novel micro lightwave antenna by employing the micro electromechanicai system processing technology. We describe a transparent antenna that has a multilevel step structure with a diameter of 4 millimeters. The ideal curve of the antenna surface is discretized by steps of constant height. The characteristics of the fabricated antenna have been measured; its gain is 84.1 dBi, which is 0.83 dB less than that of a reference antenna with a uniform field distribution. The aperture efficiency is 82.6%. The power radiation pattern is measured through the Fourier transform lens method and is in good agreement with the simulation result. Index Terms--Antenna measurement, aperture antenna gain and radiation pattern, lens antenna, lightwave antenna using micro electromechanical system (MEMS) processing.

Published
2007

21. Measurement of lightwave antennas: difficulties and peculiarities in comparison with radio-wave antennas

Author

Munemasa, Yasushi, Takano, Tadashi, Mita, Makoto, and Sano, Masatoshi

Subjects
Antennas (Electronics) -- Properties, Waves -- Properties, Business, Computers, Electronics, Electronics and electrical industries
Abstract

A technique is described for measuring the far-field radiation pattern, gain, and the transmissivity of each portion of an aperture of lightwave (optical) antennas. First, the compatibility of lightwave antennas to a system is mentioned. Then, the principles and setup for each measurement term are presented. A comparison with radio-wave antennas is also given. Index Terms--Comparison method for gain measurement, Fourier transform lens (FTL), measurement of lightwave antenna characteristics, optical antenna, pinhole scan.

Published
2007

22. Exoplanet Science with the SPICA Coronagraph Instrument

Author

Kotani, Takayuki, Enya, Keigo, Kaneda, Hidehiro, Matsuo, Taro, Ikoma, Masahiro, Ito, Yoichi, Ida, Shigeru, Haze, Kanae, Oyabu, Shinki, Ishihara, Daisuke, Sorahana, Satoko, Honda, Mitsuhiko, Inoue, Akio K., Nagasawa, Makiko, Takami, Michihiro, Fukagawa, Misato, Yamashita, Takuya, Narita, Norio, Tamura, Motohide, Oseki, Shinji, Takeuchi, Nami, Nakagawa, Takao, Matsuhara, Hideo, Kataza, Hirokazu, Kawada, Mitsunobu, Wada, Takehiko, Tsumura, Koji, Isobe, Naoki, Mita, Makoto, Komatsu, Keiji, Uchida, Hideki, Mitani, Shinji, Sakai, Shinichiro, Sarugaku, Yuki, Arimatsu, Ko, and Tao, Chihiro

Abstract

SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, Japan, SPICA Coronagraph Instrument (SCI) is an instrument dedicated for direct detection and characterization of exoplanets and also for other science that needs a high-contrast imaging and spectroscopic capability in the near to mid-infrared wavelengths. We will present the major science cases for exoplanets from the instrument proposal of SCI. Thanks to the high-contrast imaging and spectroscopic capability, we will be able to tackle the various problems on the exoplanet science. SCI will give us the unique opportunity to observationally understand the formation process of Jovian planets, which is still poorly understood, by measuring temperatures of young Jovian planets. Spectroscopy of planet atmospheres will enable us to reveal the chemical compositions by measuring the abundances of various important molecules such as CO, CH4, NH3, H2O, H2 etc. We will also access to the structure of Jovian atmosphere, for example the existence of thermal inversion which is known for our Solar system planets. Furthermore, the direct detection of icy giants around early-type stars with SCI will open a new window to investigate these enigmatic planets., 著者名の誤記: T. KOMATSU, 著者人数: 57名, 形態: カラー図版あり, The clerical error of an author's name: T. KOMATSU, Number of authors: 57, Physical characteristics: Original contains color illustrations, 資料番号: AA1730027073, レポート番号: JAXA-SP-17-010E

Published
2018

23. Micropore x-ray optics using anisotropic wet etching of (110) silicon wafers

Author

Ezo, Yuichiro, Koshiishi, Masaki, Mita, Makoto, Mitsuda, Kazuhisa, Hoshino, Akio, Ishisaki, Yoshitaka, Yang, Zhen, Takano, Takayuki, and Maeda, Ryutaro

Subjects
Anisotropy -- Usage, X-rays -- Analysis, X-rays -- Optical properties, Semiconductor wafers -- Analysis, Plasma etching -- Analysis, Astronomy, Physics
Abstract

To develop x-ray mirrors for micropore optics, smooth silicon (111) sidewalls obtained after anisotropic wet etching of a silicon (110) wafer were studied. A sample device with 19 [micro]m wide (111) sidewalls was fabricated using a 220 [micro]m thick silicon (110) wafer and potassium hydroxide solution. For what we believe to be the first time, x-ray reflection on the (111) sidewalls was detected in the angular response measurement. Compared to ray-tracing simulations, the surface roughness of the sidewalls was estimated to be 3-5 nm, which is consistent with the atomic force microscope and the surface profiler measurements. OCIS codes: 340.7470, 350.1260, 220.4000, 170.3890.

Published
2006

24. Bulk micromachined tunneling tips integrated with positioning actuators

Author

Mita, Makoto, Kawara, Hiroaki, Toshiyoshi, Hiroshi, Endo, Junji, and Fujita, Hiroyuki

Subjects
Actuators -- Mechanical properties, Microelectromechanical systems -- Product development, Engineering and manufacturing industries, Science and technology
Abstract

In this paper, we have successfully developed an integrated micromechanical system for controlling tunneling current. A pair of nanoscale tunneling tips have been integrated with a silicon micromachined electrostatic actuator of high-aspect ratio. The tip sharpness has been observed to be as sharp as commercial tips by scanning over surface of carbon graphite as an atom scale. We have also succeeded to observe the tunneling current in the air and in the vacuum condition (in TEM). [0941] Index Terms--Deep-reactive ion etching (DRIE), ICP-RIE, microactuators, scanning tunneling microscopy (STM), tunneling current.

Published
2005

25. A micromachined impact microactuator driven by electrostatic force

Author

Mita, Makoto, Arai, Makoto, Tensaka, Shouichi, Kobayashi, Dai, and Fujita, Hiroyuki

Subjects
Microelectromechanical systems -- Design and construction, Microelectromechanical systems -- Models, Actuators -- Design and construction, Engineering and manufacturing industries, Science and technology
Abstract

This paper presents a novel micromachined actuator which is developed to produce precise and unlimited displacement. The actuator is driven by impact force between a silicon micro-mass and a stopper. The suspended silicon micro-mass is encapsulated between two glass plates and driven by electrostatic force. When the mass hits the stopper which is fixed on glass plates, impact force is generated to drive the whole actuator in a nano size step (~ 10 nm). The overall dimension of the device is 3 [micro]m x 3 mm. The driving voltage is 100 V and average speed is 2.7 [micro]m/s. The total thickness is 600/ [micro]m. [723] Index Terms--Deep reactive ion etching (DRIE), displacement control, impact drive, inductive coupled plasma-reactive ion etching (ICP-RIE), microactuators.

Published
2003

26. A MEMS piggyback actuator for hard-disk drives

Author

Toshiyoshi, Hiroshi, Mita, Makoto, and Fujita, Hiroyuki

Subjects
Electromechanical devices -- Design and construction, Hard disks -- Equipment and supplies, Actuators -- Installation, Static eliminators -- Design and construction, Hard disk drive, Under 5GB hard disk drive, 5GB - 9.99GB hard disk drive, 10GB - 14.99GB hard disk drive, 15GB - 19.99GB hard disk drive, 20GB - 25GB hard disk drive, Over 25GB hard disk drive, Technology installation instructions, Engineering and manufacturing industries, Science and technology
Abstract

This paper reports a new fabrication process and designing method to integrate MEMS piggyback actuators on a silicon-on-insulator (SOI) wafer with magnetic read/write heads of hard-disk drives. Large bandwidth of the tracking servo system is designed by reducing the load mass for the tracking microactuator to be around 40 [micro]g. A prototype electrostatic MEMS actuator (2 mm x 3 mm x 0.6 mm) of multiple parallel plates has been successfully integrated by using high-aspect ratio microstructures (gap opening 2 [micro]m into 50-[micro]m-SOI wafer) patterned by deep reactive-ion-etching (DRIE). A dc displacement of 0.5 [micro]m, which is almost the same size as data track width, has been obtained at a driving voltage of dc 60 V and the fundamental resonance is found at 16 kHz. An analytical model of the MEMS piggyback actuator has been proposed to predict electromechanical performance. The fabrication method proposed here is very simple and straightforward to put the head-element-drive mechanism into practice. [818] Index Terms--Electrostatic, hard-disk drive (HDD), MEMS, microactuator, piggyback actuator, SOI.

Published
2002

28. 2.65Gbps Downlink Communications with Polarization Multiplexing in X-Band for Small Earth Observation Satellite

Author

KANEKO, Tomoki, primary, KAWANO, Noriyuki, additional, NAGAO, Yuhei, additional, MURAKAMI, Keishi, additional, WATANABE, Hiromi, additional, MITA, Makoto, additional, TOMODA, Takahisa, additional, HIRAKO, Keiichi, additional, SHIRASAKA, Seiko, additional, NAKASUKA, Shinichi, additional, SAITO, Hirobumi, additional, and HIROSE, Akira, additional

Published
2021
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29. GEO-X (GEOspace x-ray imager)

Author

Ezoe, Yuichiro, primary, Funase, Ryu, additional, Nagata, Harunori, additional, Miyoshi, Yoshizumi, additional, Kasahara, Satoshi, additional, Nakajima, Hiroshi, additional, Mitsuishi, Ikuyuki, additional, Ishikawa, Kumi, additional, Hiraga, Junko S., additional, Mitsuda, Kazuhisa, additional, Fujimoto, Masaki, additional, Ueno, Munetaka, additional, Yamazaki, Atsushi, additional, Hasegawa, Hiroshi, additional, Matsumoto, Yosuke, additional, Kawakatsu, Yasuhiro, additional, Iwata, Takahiro, additional, Sahara, Hironori, additional, Kanamori, Yoshiaki, additional, Morishita, Kohei, additional, Koizumi, Hiroyuki, additional, Mita, Makoto, additional, Mitani, Takefumi, additional, Numazawa, Masaki, additional, Kamps, Landon, additional, and Kawabata, Yusuke, additional

Published
2020
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30. Geiger-mode three-dimensional image sensor for eye-safe flash LIDAR

Author

Mizuno, Takahide, primary, Ikeda, Hirokazu, additional, Makino, Kenji, additional, Tamura, Yusei, additional, Suzuki, Yoshihito, additional, Baba, Takashi, additional, Adachi, Shunsuke, additional, Hashi, Tatsuya, additional, Mita, Makoto, additional, Mimasu, Yuya, additional, and Hoshino, Takeshi, additional

Published
2020
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31. Proto-Flight Model of SAR for 100kg Class Small Satellite

Author

Saito, Hirobumi, Pyne, Budhaditya, Tanaka, Koji, Mita, Makoto, Kaneko, Tomoki, Hirokawa, Jiro, Tomura, Takashi, Watanabe, Hiromi, Akbar, Prilando Rizki, and Ijichi, Koichi

Subjects
small satellite, 100kg class, proto-flight model, SAR
Abstract

This paper presents the proto-flight model results of X band synthetic aperture radar for small satellites including the RF power amplifier, high speed data storage/transmission system, and the ground SAR response test results. The specifications of SAR performance are single polarization SAR with 3m ground resolution for strip map mode. 1 m ground resolution can be achieved with sliding spot light mode under condition of limited value of NESZ at 600km altitude orbit. The data down link is high speed X band down link with 2-3 Gbps. In May, 2019, 2.5Gbps down link with 64APSK modulation in dual polarization channels was demonstrated by RAPIS-1 Satellite. We will launch the first demonstration SAR satellite in 2020 as collaboration with a private company.

Published
2019

32. S-310-45 号機 PI 機器準備状況

Author

Fukushima, Yosuke and Mita, Makoto

Abstract

第2回観測ロケットシンポジウム（2019年8月5日-6日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, 2nd Sounding Rocket Symposium (August 5-6, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000142010, レポート番号: Ⅳ-2

Published
2019

33. 地球磁気圏X線撮像計画 GEO-X

Author

Ezoe, Yuichiro, Miyoshi, Yoshizumi, Kasahara, Satoshi, Funase, Ryu, Nagata, Harunori, Nakajima, Hiroshi, Ishikawa, Kumi, Kanamori, Yoshiaki, Morishita, Kohei, Mita, Makoto, Hiraga, Junko, Mitsuishi, Ikuyuki, Koizumi, Hiroyuki, Yamazaki, Atsushi, Hasegawa, Hiroshi, Matsumoto, Yosuke, Mitsuda, Kazuhisa, Ueno, Munetaka, Fujimoto, Masaki, Kawkatsu, Yasuhiro, Iwata, Takahiro, Sahara, Hironori, and Ohashi, Takaya

Abstract

第19回宇宙科学シンポジウム (2019年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 19th Space Science Symposium (January 9-10, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 23名, 資料番号: SA6000144118, レポート番号: P-083

Published
2019

34. 小型衛星搭載用合成開口レーダの開発(その2)

Author

Saito, Hirobumi, Tanaka, Koji, and Mita, Makoto

Abstract

第19回宇宙科学シンポジウム (2019年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 19th Space Science Symposium (January 9-10, 2019. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 資料番号: SA6000144172, レポート番号: P-137

Published
2019

38. Dual Circularly Polarization X band 2Gbps Downlink Communication System of Earth Observation Satellite

Author

Kaneko, Tomoki, Saito, Hirobumi, Mita, Makoto, and Ohikata, Yasuhiro

Abstract

We are developing 2.8Gbps down link in X band (8025-8350MHz) from small SAR observation satellites. The modulation is 64APSK of DVB-S2X with symbol rate of 300Msps. Dual polarization channels are applied to the system. We have tested an engineering model of the transmitter, and the on-board antenna with high cross-polarization discrimination (XPD). The ground antenna with high XPD is also developed. This down link system will be demonstrated in 2019 by JAXA advanced small satellite.

Published
2018

39. Engineering-Model Results of X-Band Synthetic Aperture Radar for Small Satellite and its Application to Constellation Mission

Author

Saito, Hirobumi, Akbar, Prilando, Tanaka, Koji, Ijichi, Koichi, Mita, Makoto, Pyne, Budhaditya, Kaneko, Tomoki, and Obata, Toshihiro

Abstract

This paper presents the engineering model results of this X band synthetic aperture radar for small satellites and its application to constellation missions.The specifications of SAR performance are single polarization SAR with 1m ground resolution at 350 km altitude and with 3m ground resolution at 600km altitude orbit. A satellite is supposed to be 130kg in mass and the size is 0.7m x 0.8m x 0.9m on a rocket. A size of the deployed antenna is 4.9m x 0.7m. A chirped transmitting signal is amplified in a six GaN HEMT 200W amplifier modules to be combined in a waveguide resonator. The type of antenna system is deployable plane antenna due to its compact stow volume. Novel parallel plate slotted array antennas have been developed. We have performed compact range test, near-field measurement of an antenna wing with 2.8m x 0.7m size. The peak aperture efficiency is measured to be higher than 50%. We will launch the first demonstration satellite in late 2019. We finally will build a constellation of several tens SAR satellites with 1-3m resolution to realize from every day to every few hours revisit.

Published
2018

40. Release experiment of small probes

Author

Mita, Makoto and Fukushima, Yosuke

Subjects
Space Science, Space Technology, Format Sample
Abstract

第1回観測ロケットシンポジウム（2018年7月17日-18日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, 1st Sounding Rocket Symposium (July 17-18, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000127009, レポート番号: Ⅲ-3

Published
2018

41. Status report on onboard PI instruments for S-310-45 mission

Author

Fukushima, Yosuke and Mita, Makoto

Abstract

第1回観測ロケットシンポジウム（2018年7月17日-18日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, 1st Sounding Rocket Symposium (July 17-18, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000127016, レポート番号: V-2

Published
2018

42. Exploration of energization and radiation in geospace (ERG): challenges, development, and operation of satellite systems

Author

Soken, Ersin, Nakamura, Yosuke, Fukuda, Seisuke, Shibano, Yasuko, Ogawa, Hiroyuki, Sakai, Shin-ichiro, Shimizu, Shigehito, Miyazawa, Yu, Toyota, Hiroyuki, Kukita, Akio, Maru, Yusuke, Nakatsuka, Junichi, Sakai, Tomohiko, Takeuchi, Shinsuke, Maki, Kenichiro, Mita, Makoto, Ogawa, Emiko, Kakehashi, Yuya, Nitta, Kumi, Asamura, Kazushi, Takashima, Takeshi, and Shinohara, Iku

Subjects
Astronautics, 010504 meteorology & atmospheric sciences, Flight operations, lcsh:Geodesy, Perturbation (astronomy), Project, Radiation, 010502 geochemistry & geophysics, 01 natural sciences, symbols.namesake, Geospace, Aerospace engineering, Aerospace, Van Allen belts, 0105 earth and related environmental sciences, lcsh:QB275-343, business.industry, lcsh:QE1-996.5, lcsh:Geography. Anthropology. Recreation, Electromagnetic compatibility, Geology, Radiation belts, Arase, lcsh:Geology, lcsh:G, Space and Planetary Science, Van Allen radiation belt, ERG, symbols, Environmental science, Satellite, business, Small satellite
Abstract

著者人数: 22名, Accepted: 2018-05-16, 資料番号: SA1180066000

Published
2018

44. Development of Compact SAR Systems for Small Satellite

Author

Saito, Hirobumi, primary, Ijichi, Koichi, additional, Hirokawa, Jiro, additional, Tomura, Takashi, additional, Akbar, Prilando Rizki, additional, Pyne, Budhaditya, additional, Tanaka, Koji, additional, Mita, Makoto, additional, Kaneko, Tomoki, additional, and Watanabe, Hiromi, additional

Published
2019
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45. Arase衛星における電磁適合性について

Author

Kojima, Hirotsugu, Matsuoka, Ayako, Mita, Makoto, Kumamoto, Atsusi, Ishisaka, Keigo, Ozaki, Mitsunori, Teramoto, Mariko, Nomura, Reiko, Nakazawa, Satoru, and Asamura, Kazushi

Subjects
Nuclear Theory, Physics::Space Physics, High Energy Physics::Phenomenology, emission, electromagnetic compatibility, susceptibility
Abstract

Electromagnetic compatibility (EMC) is an important concept in keeping performance and functions of electronic devices without any degradation due to external noise. The EMC criteria in scientific satellites is decided depending on payloads of satellites. In particular, noise levels to be allowed are quite low in missions to explore space electromagnetic environments, because their targets to observe are extremely weak magnetic fields and electromagnetic waves. Each onboard instrument is required to suppress its emitting noise levels to be below the levels regulated by the EMC criteria. The present paper describes the introduction of the EMC criteria, EMC measurements on the ground and results on the orbit for the Arase satellite, which is exploring electromagnetic environments in the geospace region.

Published
2018

46. X帯2Gbps 両偏波ダウンリンク衛星通信システムの開発

Author

Akbar, Prilando, Kaneko, Tomoki, Fukami, Tomoya, Ubukata, Takashi, Watanabe, Hiromi, Prilando, Akbar, Ohikata, Yasuhiro, Mita, Makoto, Tomiki, Astushi, and Saito, Hirobumi

Abstract

第18回宇宙科学シンポジウム (2018年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 18th Space Science Symposium (January 9-10, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 資料番号: SA6000118210, レポート番号: P-177

Published
2018

47. Microsatellites with ultra compact X-ray imaging spectrometers for X-ray astronomy and planetary exploration

Author

Ezoe, Yuichiro, Miyoshi, Yoshizumi, Kasahara, Satoshi, Kimura, Tomoki, Ishikawa, Kumi, Isobe, Naoki, Nakajima, Hiroshi, Fujimoto, Masaki, Mitsuda, Kazuhisa, Ohashi, Takaya, Sahara, Hironori, Nagata, Haruki, Koizumi, Hiroyuki, Yamazaki, Atsushi, Hasegawa, Hiroshi, Mita, Makoto, Ueno, Munetaka, Funase, Ryu, Nakasuka, Shin-ichi, and Kawakatsu, Yasuhiro

Abstract

第18回宇宙科学シンポジウム (2018年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 18th Space Science Symposium (January 9-10, 2018. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 20名, 資料番号: SA6000118173, レポート番号: P-140

Published
2018

49. The ARASE (ERG) magnetic field investigation

Author

80270437, Matsuoka, Ayako, Teramoto, Mariko, Nomura, Reiko, Nosé, Masahito, Fujimoto, Akiko, Tanaka, Yoshimasa, Shinohara, Manabu, Nagatsuma, Tsutomu, Shiokawa, Kazuo, Obana, Yuki, Miyoshi, Yoshizumi, Mita, Makoto, Takashima, Takeshi, Shinohara, Iku, 80270437, Matsuoka, Ayako, Teramoto, Mariko, Nomura, Reiko, Nosé, Masahito, Fujimoto, Akiko, Tanaka, Yoshimasa, Shinohara, Manabu, Nagatsuma, Tsutomu, Shiokawa, Kazuo, Obana, Yuki, Miyoshi, Yoshizumi, Mita, Makoto, Takashima, Takeshi, and Shinohara, Iku

Abstract

The fluxgate magnetometer for the Arase (ERG) spacecraft mission was built to investigate particle acceleration processes in the inner magnetosphere. Precise measurements of the field intensity and direction are essential in studying the motion of particles, the properties of waves interacting with the particles, and magnetic field variations induced by electric currents. By observing temporal field variations, we will more deeply understand magnetohydrodynamic and electromagnetic ion-cyclotron waves in the ultra-low-frequency range, which can cause production and loss of relativistic electrons and ring-current particles. The hardware and software designs of the Magnetic Field Experiment (MGF) were optimized to meet the requirements for studying these phenomena. The MGF makes measurements at a sampling rate of 256 vectors/s, and the data are averaged onboard to fit the telemetry budget. The magnetometer switches the dynamic range between ± 8000 and ± 60, 000 nT, depending on the local magnetic field intensity. The experiment is calibrated by preflight tests and through analysis of in-orbit data. MGF data are edited into files with a common data file format, archived on a data server, and made available to the science community. Magnetic field observation by the MGF will significantly improve our knowledge of the growth and decay of radiation belts and ring currents, as well as the dynamics of geospace storms.

Published
2018

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Author

Kojima, Hirotsugu, Matsuoka, Ayako, Mita, Makoto, Kumamoto, Atsusi, Ishisaka, Keigo, Ozaki, Mitsunori, Teramoto, Mariko, Nomura, Reiko, Nakazawa, Satoru, Asamura, Kazushi, Kojima, Hirotsugu, Matsuoka, Ayako, Mita, Makoto, Kumamoto, Atsusi, Ishisaka, Keigo, Ozaki, Mitsunori, Teramoto, Mariko, Nomura, Reiko, Nakazawa, Satoru, and Asamura, Kazushi

Abstract

Electromagnetic compatibility (EMC) is an important concept in keeping performance and functions of electronic devices without any degradation due to external noise. The EMC criteria in scientific satellites is decided depending on payloads of satellites. In particular, noise levels to be allowed are quite low in missions to explore space electromagnetic environments, because their targets to observe are extremely weak magnetic fields and electromagnetic waves. Each onboard instrument is required to suppress its emitting noise levels to be below the levels regulated by the EMC criteria. The present paper describes the introduction of the EMC criteria, EMC measurements on the ground and results on the orbit for the Arase satellite, which is exploring electromagnetic environments in the geospace region.

Published
2018

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