Toshiya Hanada

Toshiya Hanada
Kyushu University | Kyudai · Department of Aeronautics and Astronautics

Doctor of Engineering
I'm working on ground- and space-based measurements of orbital debris.

About

225
Publications
27,798
Reads
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796
Citations
Citations since 2017
35 Research Items
338 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
Introduction
He is a Professor at Department of Aeronautics and Astronautics. He is teaching astrodynamics and spacecraft technology. His research interest is to confirm whether or not we really have to clean up space junks out there as in ΠΛΑΝΗΤΕΣ, the Japanese science fiction comics featuring space debris issues. To figure out the right answer to his question, he is leading IDEA the project for In-situ Debris Environmental Awareness, initiated by graduate students at Kyushu University.
Additional affiliations
April 1997 - November 2011
Kyushu University
Position
  • Professor (Associate)
April 1994 - March 1997
Kyushu University
Position
  • Research Associate
Education
April 1991 - March 1994
Kyushu University
Field of study
  • Applied Mechanics
April 1989 - March 1991
Kyushu University
Field of study
  • Applied Mechanics
April 1985 - March 1989
Kyushu University
Field of study
  • Aeronautics and Astronautics

Publications

Publications (225)
Conference Paper
Full-text available
Solar radiation pressure (SRP) is a major disturbance for a spacecraft operated in deep space missions, affecting its orbit and attitude, and high accuracy of the SRP calculation is required. The accuracy of SRP calculation is affected by the shape and surface characteristics of the satellite. However, existing computational models do not sufficien...
Conference Paper
Full-text available
Laser ablation is a vital technology for contactless active debris removal, where a service satellite with a laser system irradiates laser pulses to a target satellite to generate the ablation force for deorbiting. The deorbiting force decelerates the target, and the service satellite needs to maintain its relative position and keep irradiating. In...
Article
Remediation measures, such as Active Debris Removal (ADR) has been studied in order to preserve the space environment. Large derelict objects in crowded orbits are considered ADR targets because they are the source of numerous small debris in case of fragmentation. The target for removal must be chosen carefully because cost is the major issue in r...
Article
Full-text available
This paper briefly introduces a new approach to estimate some orbital parameters of on-orbit satellite fragmentations (specifically, the direction of angular momentum at a specific time and the time change in direction of angular momentum) from in-situ debris measurements. This approach, as in previous studies, adopts a constraint equation derived...
Article
Full-text available
An active debris removal method using a laser is a promising technology for its advantage in contactless operations. This paper deals with the attitude control of an uncooperative target by a laser, which is an important phase before deorbiting. The difficulty of attitude control by the laser stems from the torque directional constraint because the...
Conference Paper
Full-text available
Wireless Power Transmission (WPT) technology using a satellite-to-satellite system represents a valuable and convenient technology for transferring power wirelessly among Space Solar Power Satellites (SSPS) to Satellite and potential upcoming interplanetary missions. This direct transmission offers a possible solution to deliver continuous, conveni...
Article
This paper presents an overview of space solar power satellites for the Moon and Mars mission and simultaneously demonstrates the compression of traditional power generation methods for the orbiter, lander, and habitat on Mars and the Moon. Interplanetary missions are where the space engineers work on the satellites, conceptual design of space habi...
Article
Full-text available
End-of-life support of satellites is necessary to improve post-mission-disposal compliance rates for maintaining space environment. Deorbit mission with low thrust, e.g. a laser, induces a low-level deceleration on the target object that gradually lowers the target altitude. Since such a low-thrust trajectory is time-consuming, the risk of collisio...
Article
This paper aims to assess the risk of mission termination for a large constellation of satellites in a low-Earth orbit. Many large constellations will be deployed to provide broadband network services using thousands of satellites. There is concern that such large constellations will have a serious impact on the long-term sustainability of outer sp...
Article
This study aims to develop an effective strategy for geostationary satellites to avoid collisions with space debris satisfying various operational constraints. Recently, the number of space objects is continuously increasing to threaten operational satellites in the geostationary region. Studies on collision avoidance have been advanced for a long...
Thesis
Full-text available
http://hdl.handle.net/2324/4772309 Wireless Power Transmission (WPT) technology using a satellite-to-satellite system represents a valuable and convenient technology for transferring power wirelessly among Space Solar Power Satellites (SSPS) to Satellite and potential upcoming interplanetary missions. This direct transmission offers a possible sol...
Preprint
Full-text available
The authors regret that Eqs. (6) and (8)-(10) in the published article were not correctly presented. Nevertheless, the first author has confirmed that the equations used in programs were correct, and therefore, the results and information presented in the figures and tables are all correct. Following is the correction to the equations and descripti...
Conference Paper
This paper illustrates and explains the benefits of Laser-based Wireless Power Transmission system models, including functional principles and mathematical formulation. Wireless power transfer is a possible solution for delivering continuous, convenient, and unlimited energy supply to satellites. Satellite industries traditionally use photovoltaic...
Article
Full-text available
Wireless Power Transmission technology using a satellite-to-satellite system represents a valuable and convenient technology for transferring power wirelessly among Space Solar Power Satellites to Satellite and potential future interplanetary missions. This direct transmission can help replace traditional power storages and reduce the weight and ul...
Conference Paper
Full-text available
Among various satellite actuators, magnetic torquers have been widely equipped for stabilization and attitude control of small satellites. Although magnetorquers are generally used with other actuators, such as momentum wheels, this paper explores a control method where only a magnetic actuation is available. We applied a nonlinear optimal control...
Article
Space debris smaller than 2 mm that cannot be detected by ground-based observations may lead to a spacecraft's mission end. Therefore, multiple institutes and organizations have conducted in-situ measurement projects including the IDEA (In-situ Debris Environmental Awareness) project, which has been initiated at Kyushu University. The previous rese...
Article
The collision probabilities of debris objects with and without Post Mission Disposal (PMD) and Active Debris Removal (ADR) are evaluated and discussed. A debris evolutionary model named NEODEEM was jointly developed by Kyushu University and JAXA for use in predicting future debris populations and calculating collision probabilities. The collision p...
Article
Full-text available
This research proposes an innovative approach to detumble satellites’ triple-axis angular velocities with only one single-axis magnetic torquer. Since magnetic torque is generated perpendicularly to magnetorquers, no intended control torque along the magnetorquer can be produced, which makes systems underactuated. Our paper introduces a control met...
Article
This paper proposes an effective observation planning method targeting fragmentation debris originated from several different breakup events. Given orbital elements of fragmentation debris in a database, or two-line element set (TLE) of cataloged debris, their orbital configurations can be predicted for a specific date, as well as their orbital dir...
Conference Paper
Full-text available
Photometric data obtained by ground-based observation provide much information of space objects such as their orbit, attitude, shape, and surface properties, which are useful sources for Space Situational Awareness (SSA). Such complicated and coupled information, however, makes state estimation with photometric data difficult, because expressing an...
Conference Paper
Full-text available
Grasping of dynamic states of space objects such as shape, attitude, and surface properties plays a significant role in removing orbital debris and in monitoring the health of operational satellites. Light Curve Inversion is a cost-effective state estimation technique using light curves, a time history of magnitude obtained by ground-based observat...
Conference Paper
Orbital debris mitigation is becoming increasingly important as the popularity of using small satellites by governments, industry and academia is increasing. Improvements in technology and reducing the cost of access to space have made it easier to deploy space missions. Small satellite systems can provide significant benefit to STEM research, prov...
Article
Even sub-millimeter-size debris could cause a fatal damage on a spacecraft. Such tiny debris cannot be followed up or tracked from the ground. Therefore, Kyushu University has initiated IDEA the project for In-situ Debris Environmental Awareness, which conducts in-situ measurements of sub-millimeter-size debris. One of the objectives is to estimate...
Article
To date, there has been a lot of on-orbit satellite fragmentations since a Thor-Able upper stage exploded in space in 1961. Considering that even sub-millimeter-size debris are a big threat to operational satellites, then it can be said that detailed debris modelling is becoming an urgent task for sustainable space development. For accurate modelli...
Article
Space debris smaller than 2 mm that cannot be detected by ground-based observations may lead to a spacecraft's missions end. Therefore, IDEA, the project for In-situ Debris Environmental Awareness, which aims to detect sub-millimeter-size debris using a group of micro satellites, has been initiated at Kyushu University. To estimate the debris envir...
Article
Debris mitigation measures such as post-mission disposal (PMD) were set by considering the effects thereof using a debris evolutionary model. Many small satellites have recently been deployed in orbit and various plans are proposed for a so-called mega-constellation consisting of thousands of satellites in Low Earth Orbit (LEO). New systems such as...
Article
Orbital debris remains as an obstacle to further space development. While efforts are ongoing to avoid newly launched objects becoming debris, the number of debris would still continue to grow because of collisions. ADR (Active Debris Removal) is an effective measure, but building a sustainable economic model for ADR remains as a difficult problem....
Conference Paper
Orbital debris smaller than 1 mm in size still have enough energy to cause a fatal damage on a spacecraft, but such tiny debris cannot be followed or tracked from the ground. Therefore, Kyushu University has initiated IDEA the project for In-situ Debris Environmental Awareness. This project aims to measure the sub-millimeter-size debris with a cons...
Article
The growth of the near-Earth debris population since the beginning of human space activities is now a fact commonly admitted by space agencies worldwide. Numerous entities have warned about the danger that debris may have over time. Presently mitigation methods such as imposing post-mission disposal time after launch will no longer be sufficient; r...
Conference Paper
Full-text available
Space debris smaller than 1 mm in size still have enough energy to cause a fatal damage on a spacecraft, but such tiny debris cannot be followed or tracked from the ground. Therefore, Kyushu University has initiated IDEA the project for In-situ Debris Environmental Awareness. This project aims to measure the sub-millimeter-size debris with a conste...
Article
Space debris smaller than 1 mm in size still have enough energy to cause a fatal damage on a spacecraft, but such tiny debris cannot be followed or tracked from the ground. Therefore, IDEA the project for In-situ Debris Environmental Awareness, which aims to detect sub-millimeter-size debris using a group of micro satellites, has been initiated at...
Article
Inspired by the successful extended missions such as the ISEE-3, an investigation for the extended mission that involves a lunar encounter following a Sun-Earth halo orbit mission is considered valuable. Most previous studies present orbit-to-orbit transfers where the lunar phase is not considered. For extended missions, the present work aims to so...
Article
This paper presents a novel method to simultaneously detect multiple trajectories of space debris in an observation image sequence to establish a reliable model for space debris environment in Geosynchronous Earth Orbit (GEO). The debris in GEO often appear faintly in image sequences due to the high altitude. A simple but steady way to detect such...
Article
Full-text available
This paper investigates the Earth escape for spacecraft in a Sun-Earth halo orbit. The escape trajectory consists of first ejecting to the unstable manifold associated with the halo orbit, then coasting along the manifold until encountering the Moon, and finally performing lunar-gravity-assisted escape. The first intersection of the manifold tube a...
Article
This paper briefly introduces efforts into space debris modeling towards a better understanding of space debris environment. Space debris modeling mainly consists of debris generation and orbit propagation. Debris generation can characterize and predict physical properties of fragments originating from explosions or collisions. Orbit propagation ca...
Conference Paper
Full-text available
This paper briefly introduces efforts into space debris modeling towards a better understanding of space debris environment. Space debris modeling mainly consists of debris generation and orbit propagation. Debris generation can characterize and predict physical properties of fragments originating from explosions or collisions. Orbit propagation ca...
Article
This work proposes a method to determine orbital plane of a micron-sized space debris cloud utilizing their impacts on measurement satellites. Given that debris impacts occur on a line of intersection between debris and satellites orbital planes, a couple of debris orbital parameters, right ascension of the ascending node, inclination, and nodal re...
Article
Full-text available
Currently, the danger due to debris in earth orbit is increasing. Furthermore, methods for the removal of such orbital debris have become the subject of attention. This paper proposes a concept for passive Orbital Debris Removal (ODR). In the passive ODR described in this research, a large area of polyimide foil is opened. Low earth orbit micro-deb...
Article
This study proposes an algorithm to detect orbital objects that are small or moving at high apparent velocities from optical images by utilizing their faint streaks. In the conventional object-detection algorithm, a high signal-to-noise-ratio (e.g., 3 or more) is required, whereas in our proposed algorithm, the signals are summed along the streak d...
Article
This paper introduces an effort to precisely describe attitude motion under full orbit perturbations. To define the attitude of an Earth-orbiting spacecraft, this study introduces a reference frame being affected by orbit perturbations. Unlike the commonly adopted reference frame, the reference frame introduced here is fully perturbed, so that it r...
Conference Paper
The number of small satellites as those that do not exceed 50kg is rapidly increasing in the low-Earth orbit region. Since the orbital debris mitigation guidelines released by United Nations, Inter-Agency Space Debris Coordination Committee and national space agency does not consider small satellites and typical large satellites separately, small s...
Article
The In-Situ Debris Environment Awareness System has been developed. The objective of the system is to measure small debris (between 100 μm and several cm) in orbit. The orbital distribution and the size distribution of the debris are not well understood. The size distribution is difficult to measure from the ground, although the size distribution i...
Conference Paper
Full-text available
Halo orbit missions are of many applications and become popular. An investigation on the extended mission following halo orbit missions would be worthwhile. In a previous study, the strategy of using the unstable manifolds associated with the Sun-Earth L1/L2 halo orbit and lunar gravity assists for Earth escape was analyzed to be advantageous for e...
Patent
A method of detecting space debris includes: generating a virtual space debris in accordance with the law of conservation of mass by applying a debris breakup model to an object of breakup origin; calculating an orbit of each virtual space debris based on a debris orbit propagation model; and generating appearance frequency distribution of a motion...
Article
Unnecessary artificial objects, or so-called space debris, orbiting Earth contaminate the orbital environment and represent a serious problem for sustainable space development and use. One fundamental debris countermeas- ure is object tracking and cataloging. Such catalogs allow spacecraft mission risk assessment and the conducting of collision-avo...
Article
Developers of small satellites may think of enlarging their effective cross-sectional area to minimize the long-term presence in the low Earth orbit region. However, the enlargement of their effective cross-sectional area causes the temporal increase of cumulative probability of accidental collisions. This paper evaluates the influence of small sat...
Conference Paper
Kyushu University has proposed a strategy applicable to optical search and origin identification of fragmentation debris generated by breakups of spacecraft and rocket bodies. This strategy can predict the population and the motion of fragments by using debris modelling techniques. An observation of fragments from a specific breakup was actually co...
Conference Paper
This study aims to secure future Earth-to-Moon commercial space travels starting from year 2045. After evaluating risky objects for the mission, the present study focuses on the next step: active debris removal in order to eliminate the related risks. The current proposal consists in launching a mother satellite into the identified objects’ orbital...
Conference Paper
The geostationary region is a unique natural resource that is useful for mankind activities. If accidental collisions take place in the geostationary region, space communities would suffer great inconveniences. Therefore, it is necessary to assess collision risk in this particular region. Kyushu University has developed GEODEEM, an orbital debris e...
Conference Paper
Kyushu University has initiated a project to understand the current micron-size debris environment by small satellites equipped with impact sensors. The objective of this study is to establish an estimation approach to identify an orbit on which a breakup event occurs using the measurement data from the satellites. This study assumes that two measu...
Conference Paper
Full-text available
Orbital object catalogue maintenance capability should be improved to correspond to future orbital environment because space objects population grows continuously. This paper proposes a follow-up observatory consists of uses of our new image-processing algorithm and the multi-telescope observation method. The algorithm enables to improve SNR of str...
Conference Paper
This paper proposes an efficient method to detect and track for debris in Geosynchronous Earth Orbit (GEO) using an image sequence and a voting scheme. The proposed method utilizes several motion features appearing in an image sequence which are obtained from a telescope fixed for the azimuth and elevation angles at a certain frame interval. Basica...
Article
This paper demonstrates an initial orbit determination method that solves the problem by a genetic algorithm using two well-known solutions for the Lambert’s problem: universal variable method and Battin method. This paper also suggests an intuitive error evaluation method in terms of rotational angle and orbit shape by separating orbit elements in...
Article
Full-text available
Upper atmospheric densities during geomagnetic storms are usually poorly estimated due to a lack of clear understanding of coupling mechanisms between the thermosphere and magnetosphere. Consequently, the orbit determination and propagation for low-Earth-orbit objects during geomagnetic storms have large uncertainties. Artificial neural networks ar...
Conference Paper
The paper investigates the escape strategy using the unstable manifolds of the Sun-Earth L2 halo orbit and lunar gravity assist. There are four cases of intersec- tion of the manifold tubes associated with halo orbits and the orbit of the Moon. The four intersections have different V∞ with respect to the Moon. The corre- sponding lunar gravity assi...
Conference Paper
The proposed research aims to secure future Earth-to-Moon commercial space travels starting from year 2045. In order to achieve this objective, precise knowledge of the space environment along this transfer orbit is required. There- fore, this proposal aims to predict the debris environment of both low-Earth and geostationary orbits as it may be in...
Conference Paper
Space System Dynamics Laboratory in Kyushu University has initiated IDEA, the project for In-situ Debris Environmental Awareness to correctly understand current space debris problem. In order to estimate debris environment on orbit, we use a constellation of small satellites which are covered with a detector of dust impact. In this paper, some resu...
Conference Paper
This study investigates abrupt orbital changes, i.e., orbital anomalies (OAs), of the very old upper-stages Titan Transtages inserted into the geostationary orbit (GEO) region in 1960s and 1970s to find evidences of breakups. The product of the radiation pressure coefficient (Cr) and the area-to-mass ratio (A/m) are estimated by utilizing eccentric...
Article
Full-text available
The orbital debris modeling can build evolutionary models as essential tools to predict the current or future orbital debris populations, and also to discuss what and how to do for orbital debris mitigation and environmental remediation. The orbital debris modeling can also devise an effective search strategy applicable for breakup fragments in the...
Article
The presence of orbital debris is a potential risk for sustainable space development and its utilization for humankind. Prevention of large-scale spacecraft breakup events is a crucial part of countermeasures against orbital debris, and one of the key related technologies is the collision avoidance maneuver. Current observations are insufficient to...
Conference Paper
Full-text available
The Earth orbit has been contaminated by artificial objects for decades. Therefore, Space Situational Awareness (SSA) is one of the most important actions for safe and sustainable space development and its utilizations. Orbital objects tracking and maintaining their catalog is the fundament of the activities. To improve the effectiveness of SSA act...
Conference Paper
Orbital debris removal is suggested for sustainable space development and utilization for human being to deal with the recent orbital debris issues. Kyushu University in Japan has operated a Meade telescope since 2012, and started working on investigation of knowledge on how objects to be removed are tumbling using light curve. However, the estimat...
Article
This paper proposes a comprehensive approach to associate origins of space objects newly discovered during optical surveys in the geostationary region with spacecraft breakup events. A recent study has shown that twelve breakup events would be occurred in the geostationary region. The proposed approach utilizes orbital debris modeling techniques to...
Conference Paper
Full-text available
Unnecessary artificial objects so called " space debris " orbiting around the Earth are contaminating orbital environment and this situation is a serious problem for sustainable space developments and utilizations. One of the fundamentals for debris countermeasure is to track objects and making their catalog. The catalog enables space crafts to ass...
Conference Paper
Full-text available
The purpose of this research is to estimate as-yet-unknown environment of tiny debris between 100 µm and 1 mm. Because of its high velocity, even though micron size debris, it is quite possible to cause critical damage on spacecraft. It might be a major obstacle to future development of space technology. Therefore, for the safe and secure space dev...
Conference Paper
Full-text available
For safe and sustainable space activities, orbital debris environment must be remediated. When active debris removal is considered, the target's attitude motion should be known for a succession of the removal mission. The necessity for information about the target's attitude motion comes from a way to remove debris: targeting them and exerting some...
Conference Paper
Full-text available
This paper proposes a method to effectively estimate scales of breakup events in the geostationary region. The proposed method is based on the orbital debris modeling techniques, which describes generation and orbit propagation of debris. Previous methods require orbital parameters resulting from follow-up observations, whereas the proposed method...
Conference Paper
Full-text available
The orbital debris modeling, which describes debris generation and orbit propagation, can build orbital debris evolutionary models as essential tools to predict the current or future orbital debris populations, and also to discuss what and how to do for orbital debris mitigation and remediation. The orbital debris modeling can also devise an effect...
Conference Paper
Full-text available
This paper introduces an effort on going at Kyushu University to precisely describe attitude motion under full orbit perturbations. Five people in total are participating in this effort because of their own objectives. For example, some people apply this effort to understand dynamics of light curve, the change of light intensity or visible magnitud...
Conference Paper
Full-text available
Atmospheric densities during geomagnetic storms are usually poorly predicted due to the lack of clear understanding of the coupling mechanism between thermosphere and magnetosphere in such circumstances. Consequently, the orbit prediction under severe geomagnetic condition has large uncertainty. Neural networks are often used to identify nonlinear...
Conference Paper
Full-text available
Wireless power transmission is useful in the environment where has difficulty to build electrical equipment. Currently, ground use of this technology is enthusiastic; however, space use has wide possibilities, but visualizing utilization is still developing. For future use of wireless power transmission in space, this research tries to clarify the...