Space debris measurements in Japan

Takano, Tadashi; Tajima, Toru; Satoh, Takehiro; Arimoto, Yoshinori

doi:10.1016/s0273-1177(98)00230-0

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…Nonetheless, a few works from other nations are also noteworthy. The Middle and Upper (MU) atmosphere radar of Kyoto University is a powerful VHF (46.5 MHz) radar that has the longest history of space debris measurements in Japan [59]. The MU radar is a circular 100 m phased array composed of 475 crossed Yagi antennas, located in Shigaraki (Japan).…”

Section: Other Countries' Radar Measurementsmentioning

confidence: 99%

“…The MU radar is a circular 100 m phased array composed of 475 crossed Yagi antennas, located in Shigaraki (Japan). It is capable of transmitting a RHCP signal with a peak power of 1 MW [59,60]. The features of the MU radar allow for different types of analysis on space debris, such as orbit determination using a single track [59], variation in measured RCS [60], and shape estimation [60,61].…”

Section: Other Countries' Radar Measurementsmentioning

confidence: 99%

“…It is capable of transmitting a RHCP signal with a peak power of 1 MW [59,60]. The features of the MU radar allow for different types of analysis on space debris, such as orbit determination using a single track [59], variation in measured RCS [60], and shape estimation [60,61]. Such characteristics guarantee a high sensitivity, enough to make the MU radar performances comparable to those of the US SSN sensors, as demonstrated by a campaign performed in 1989 [60].…”

Section: Other Countries' Radar Measurementsmentioning

confidence: 99%

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Crowded Space: A Review on Radar Measurements for Space Debris Monitoring and Tracking

et al. 2021

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Space debris monitoring is nowadays a priority for worldwide space agencies, due to the serious threat that these objects present. More and more efforts have been made to extend the network of available radar systems devoted to the control of space. A meticulous review has been done in this paper, in order to find and classify the considerable amounts of data provided by the scientific community that deal with RADAR measurement for the debris monitoring and tracking. The information gathered is organized based on the volume of found data and classified taking into account the geographical location of the facilities.

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Section: Other Countries' Radar Measurementsmentioning

confidence: 99%

Section: Other Countries' Radar Measurementsmentioning

confidence: 99%

Section: Other Countries' Radar Measurementsmentioning

confidence: 99%

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Crowded Space: A Review on Radar Measurements for Space Debris Monitoring and Tracking

et al. 2021

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“…Events such as the collision between Iridium 33 and Cosmos 2,251 satellites and the Chinese anti-satellite missile test on non-functional meteorological satellite Fengyun FY-1C (Butterworth-Heinemann et al, 2010a;Hakima et al, 2018) increased the space debris problem dramatically. This situation constitutes a vital case since operational satellites are in danger of crashing and threatened to be destroyed by space debris (Klinkrad et al, 1995;NASA Safety Standard-Office of Safety and Mission Assurance, 1995;Blagun et al, 1999;Takano et al, 1999;Walker et al, 2001;Wnuk, 2001;Marks, 2008). Moreover, newly planned satellite missions may be interrupted by satellites already placed in different orbital trajectories (Bess, 1975).…”

Section: Introductionmentioning

confidence: 99%

ET-Class: An Energy Transfer-Based Classification of Space Debris Removal Methods and Missions

Yalçin¹,

Martinez²,

Delisle³

et al. 2022

Front. Space Technol.

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Space debris is positioned as a fatal problem for current and future space missions. Many effective space debris removal methods have been proposed in the past decade, and several techniques have been either tested on the ground or in parabolic flight experiments. Nevertheless, no uncooperative debris has been removed from any orbit until this moment. Therefore, to expand this research field and progressing the development of space debris removal technologies, this paper reviews and compares the existing technologies with past, present, and future methods and missions. Moreover, since one of the critical problems when designing space debris removal solutions is how to transfer the energy between the chaser/de-orbiting kit and target during the first interaction, this paper proposes a novel classification approach, named ET-Class (Energy Transfer Class). This classification approach provides an energy-based perspective to the space debris phenomenon by classifying how existing methods dissipate or store energy during the first contact.

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Adaptive Control Scheme for Space Debris Capture in the Presence of Mass and Inertia Uncertainty

Christidi-Loumpasefski,

Yalçın,

Delisle

et al. 2024

IEEE Access

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This paper proposes an adaptive control scheme for capturing uncooperative space debris having uncertain inertial parameters. Debris parameters may be unknown or uncertain due to limited data or changes in orbit due to collisions. To address this challenge, the proposed scheme integrates an inertial parameter identification law with the impedance control strategy of FlexeS (Flexible Capture System). During the pre-capture phase, motion data is utilized to identify the debris' center of mass (CM), leading to the optimal capture point that minimizes impact moments. During contact, the impedance-controlled actuator(s) is(are) activated while the scheme concurrently provides accurate estimates of the debris mass and inertia, enabling the updating of controller gains and thus ensuring sufficient contact time for successful capture. Hence, the proposed adaptive scheme allows FlexeS to handle the debris parameter uncertainties. The simulation study demonstrates the scheme's effectiveness and necessity. The performance of the proposed adaptive scheme is compared with a non-adaptive scheme. The results affirm the superiority of the adaptive scheme in achieving successful soft capture of uncooperative debris in the presence of mass and inertia uncertainties and highlight its potential for future space debris mitigation missions.

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Space debris measurements in Japan

Cited by 3 publications

References 2 publications

Crowded Space: A Review on Radar Measurements for Space Debris Monitoring and Tracking

Crowded Space: A Review on Radar Measurements for Space Debris Monitoring and Tracking

ET-Class: An Energy Transfer-Based Classification of Space Debris Removal Methods and Missions

Adaptive Control Scheme for Space Debris Capture in the Presence of Mass and Inertia Uncertainty

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