A5039088371- Spacecraft Design and Technology
- Space Satellite Systems and Control
- Satellite Communication Systems
- Inertial Sensor and Navigation
- Astro and Planetary Science
- Planetary Science and Exploration
- Ionosphere and magnetosphere dynamics
- Spacecraft and Cryogenic Technologies
- Real-Time Systems Scheduling
- Atmospheric Ozone and Climate
- Spacecraft Dynamics and Control
- Geophysics and Gravity Measurements
- Rocket and propulsion systems research
- Satellite Image Processing and Photogrammetry
- Astrophysics and Cosmic Phenomena
- Real-time simulation and control systems
- Aerospace Engineering and Energy Systems
- Radiation Effects in Electronics
- Solar and Space Plasma Dynamics
- Adaptive optics and wavefront sensing
- Gamma-ray bursts and supernovae
- Space exploration and regulation
- Remote Sensing and Land Use
- Calibration and Measurement Techniques
- Gyrotron and Vacuum Electronics Research
Tohoku University
2015-2024
Tohoku Institute of Technology
2024
Nagoya University
2008-2017
Nihon University
2013
University of Fukui
2013
University of Stuttgart
2007-2010
Kyushu University
2002
Tokyo Institute of Technology
1994-1995
We present new large field observations of molecular clouds with NANTEN2 toward the super star cluster NGC 3603 in transitions 12CO(J = 2–1, J 1–0) and 13CO(J 1–0). suggest that two at 13 km s−1 28 are associated as evidenced by higher temperatures H ii region, well morphological correspondence. The mass is too small to gravitationally bind them, given their relative motion ∼20 s−1. collided each other 1 Myr ago trigger formation cluster. This scenario able explain origin highest stellar...
RX J1713.7-3946 is the most remarkable very-high-energy \gamma-ray supernova remnant which emits synchrotron X-rays without thermal features. We made a comparative study of CO, HI and in order to better understand relationship between X-rays, molecular atomic gas. The results indicate that are enhanced around CO clumps on pc scale but decreased inside 0.1 scale. Magnetohydrodynamic numerical simulations shock interaction with gas waves excite turbulence amplifies magnetic field (Inoue et al....
We have carried out a spectral analysis of the Suzaku X-ray data in 0.4–12 keV range toward shell-type very high-energy γ-ray supernova remnant (SNR) RX J1713.7−3946. The aims this are to estimate detailed X-rays properties at high angular resolution up 2 arcmin and compare them with interstellar gas. spectrum is non-thermal used calculate absorbing column density, photon index, absorption-corrected flux. index varies significantly from 2.1 2.9. It shown that intensity well correlated...
This study developed a finite element method (FEM) dynamic simulation to visualize the deployment behavior of thin membrane structures in space environment. The proliferation debris resulting from accelerated development threatens future space. Numerous researchers have explored strategies prevent artificial remaining and becoming debris. One such involves utilizing drag sail device de-orbit structures, which reduces their kinetic energy by inducing additional atmospheric drag, allowing them...
A micro-satellite for wide-field near-UV transient exploration PETREL is presented. The scientific goal to detect sources, such as GW sources accompanied by EM emission, supernovae, and other unknown phenomena in the UV sky, reveal nature of explosive universe through multimessenger observations. equipped with an 80 mm refractor coupled BI-CMOS detector. powerful OBC automatically processes received data searches orbital transients. If a detected, alert immediately sent over Globalstar...
Although nano/microsatellites have great potential as remote sensing platforms, the spatial and spectral resolutions of an optical payload instrument are limited. In this study, a high resolution multispectral sensor, High-Precision Telescope (HPT), was developed for RISING-2 microsatellite. The HPT has four image sensors: three in visible region spectrum used composition true color images, fourth near-infrared region, which employs liquid crystal tunable filter (LCTF) technology wavelength...
The RISING-2 microsatellite was launched in May 2014 into a sun-synchronous circular orbit at height of 628 km. This paper describes the operation results and flight evaluation bus system. satellite successful obtaining images Earth using high-resolution multi-spectral telescope system with 5-m spatial resolution red–green–blue (RGB) observations 10-m spectral observations. weight is 43.2 kg, shape almost cubic, sides 50 cm length. has an attitude control that uses three-axis reaction...
Professor Shinichi Nakasuka of University Tokyo is now leading a small satellite development activity within the scope Japanese FIRST (Funding Program for World-Leading Innovative R&D on Science and Technology) program. In this program several 50 kg class microsatellites are going to be developed launched by end fiscal year 2013, including one scientific microsatellite under international cooperation. Tohoku has been assigned as project leader named RISESAT (Rapid International Scientific...
A low-cost attitude determination and control system (ADCS) is proposed for nadir-pointing control. This comprises three-axis magnetorquers magnetometers. The aim developing this to establish a method using only spacecraft components active Recently, reliable development has become required development. Generally, star trackers, reaction wheels, thrusters are used accurate They have high reliability but their cost becomes barrier realization. Contrarily, ADCS, having magnetometers, can be...
ALE-1, a micro-satellite created for the demonstration of artificial shooting stars, required orbital descent before mission execution due to safety aspects in orbit. ALE-1 utilized drag sail called SDOM (Separable De-Orbit Mechanism) passive de-orbit maneuver, which was successfully completed, lowering orbit from about 500 km down 400 km. This paper summarizes detailed history satellite operation and results maneuver during past three years. Although faced difficulty keeping desired...
Recent startups and university space activities extend to cis-lunar near-Earth interplanetary field. One of the biggest hurdles in those missions is orbit determination based on range measurements, while radio transmission reception capability becomes within small organizations' facilities. Also, about navigation space, conventional GNSS (Global Navigation Satellite System) real time positioning hardly available some alternative methods have been sought. The most straight forward approach be...
This paper summarizes the attitude control system of 50-kg micro satellite RISING-2, which is now under development by Tohoku University and Hokkaido University. The main mission RISING-2 Earth surface observations with 5-m resolution using a Cassegrain telescope 10-cm diameter 1-m focal length. Accurate capability less than 0.1 deg direction errors 0.02 deg/s angular velocity required to realize this observation. In addition, because larger power consumption science units expected,...
The ground test environment is established for rapid development and raising high operational reliability of micro-satellites. It aims to verify the attitude determination control system (ADCS) in hardware-in-the-loop simulation. In this research, performance simulator improved verified based on flight data real satellite. Space Robotics Laboratory (SRL) Tohoku University has developed two 50-kg-class Due a short term, verification required supporting ADCS. SRL Model-based Environment...
have developed a 1U-size CubeSat "FREEDOM".The mission of FREEDOM is to demonstrate thin film deployment mechanism called the De-Orbit Mechanism (DOM) for space debris prevention, and includes film, early de-orbiting, tracking its orbit transition.FREEDOM was released into low Earth from International Space Station using robotic arm Japanese Experiment Module "Kibo" on January 16, 2017.The initial altitude approximately 410 km.The transition monitored by obtaining publicly available two line...
Radiometric calibration utilizing the Moon as a reference source is termed lunar calibration. It useful method for evaluating performance of optical sensors onboard satellites orbiting Earth. Lunar provides sufficient radiometric opportunities without requiring any special equipment, and suitable nano/microsatellites. This study applies to multispectral sensor, Ocean Observation Camera (OOC), on board microsatellite named Rapid International Scientific Experiment Satellite. Simulating...
Effects of space radiation on systems have been considered as the main challenge in designing sustainable systems, and investigations done about mitigation methods against various types effects. On March 11, 2011, a massive earthquake tsunami hit eastern Japan, particularly Tohoku area. Since then, Fukushima Daiichi Nuclear Power Station has facing crisis. To respond to this situation, University conducted studies redesign mobile robots for disaster response missions, realized fact that...
Abstract Rapid International Scientific Experiment Satellite (RISESAT) is a small Japanese experimental Earth‐observing, science and technology demonstration satellite. One of the scientific instruments onboard miniature radiation monitor telescope RISEPix with two Timepix detectors, developed built at Institute Experimental Applied Physics, Czech Technical University in Prague. After its successful launch January 2019, RISESAT joined other still operational satellites our Timepix‐based...
This paper summarizes the attitude control system and evaluation of 50kg class micro satellite RISING-2, which has developed by Hokkaido University Tohoku from 2010. In 2011, flight models each component were completed now software RISING-2 is adjusted in order to put into an orbit 2013. The missions are observation earth surface, cumulonimbus clouds planets with a telescope, measurement surface ocean temperature distribution using bolometer array photography sprite luminescence phenomenon...
The Space Robotics Laboratory of Tohoku University has three 50kg Micro-satellite projects. first satellite “SPRITE-SAT” been successfully launched into Earth orbit, and also operated. flight model the second “RISING-2” assembled its software development is now finalized, being ready for launch planned in next year. third “RISESAT” project during Engineering Model (EM) phase at time writing. Some micro-satellites can repair by batch file on orbit however most it not able to basic...
With increasing number of microsatellite launches, the mitigation space debris is becoming a pressing problem. An easy-handling de-orbit device required to deal with this issue. However, existing devices face some problems when being installed in microsatellite. These include volume, direction which booms are extended, and battery consumption. Since 2010, Tohoku University Nakashimada Engineering Works, Ltd., have been developing De-Orbit Mechanism (DOM) that deploys thin film drag...