著者
眞庭 知成 花田 俊也 河本 聡美
出版者
一般社団法人 日本航空宇宙学会
雑誌
日本航空宇宙学会論文集 (ISSN:13446460)
巻号頁・発行日
vol.58, no.674, pp.83-89, 2010 (Released:2010-03-25)
参考文献数
18
被引用文献数
3 2

Since the launch of Sputnik, orbital debris population continues to increase due to ongoing space activities, on-orbit explosions, and accidental collisions. In the future, it is expected that a great deal of fragments will be created by explosions and collisions. Thus, the number of space debris may increase exponentially (Kessler Syndrome). This paper analyzes the Kessler Syndrome using the Low Earth Orbital Debris Environmental Evolutionary Model (LEODEEM) developed at Kyushu University with collaboration from JAXA. The purpose of the study aims at understanding the issues related to space environment conservation. The results provide effective conditions of Active Debris Removal which is one of the space debris mitigation procedures.
著者
鳴海 智博 花田 俊也 河本 聡美
出版者
一般社団法人 日本航空宇宙学会
雑誌
宇宙技術 (ISSN:13473832)
巻号頁・発行日
vol.7, pp.11-17, 2008 (Released:2008-03-11)
参考文献数
13
被引用文献数
6 8

Study and long-term prediction of orbital debris environment in low Earth orbits are urgent needs for secure human space development and exploration. This paper introduces some results of Low Earth Orbital Debris Environmental Evolutionary Model (LEODEEM) being researched at Kyushu University with collaboration from JAXA for the purpose of discussing problems of space environment conservation. The model calculates LEO debris evolution (less than 2,000 km altitude of perigee) taking into account collisions, and future launch traffic. It becomes possible to predict a long term LEO environment and investigate future mission hazard evaluation by using this model.
著者
池田 哲平 中邨 康弘 山極 芳樹 大津 広敬 河本 聡美 大川 恭志 中島 厚
出版者
一般社団法人 日本航空宇宙学会
雑誌
宇宙技術 (ISSN:13473832)
巻号頁・発行日
vol.7, pp.37-43, 2008 (Released:2008-08-21)
参考文献数
6

The Japan Aerospace Exploration Agency (JAXA) is investigating an active space debris removal system that employs highly-efficient electrodynamic tether (EDT) technology. As an electron collector of the EDT for debris de-orbiting, a multiple bare tethers are to be used. In order to simulate the EDT operation, current-voltage (I-V) characteristics of the multiple bare tethers need to be investigated on conditions that a theoretical formula cannot be applied. Therefore, numerical simulations and ground experiments have been conducted to obtain the I-V characteristics. A result of the numerical simulations and the ground experiments showed a double-line bare tethers can collect larger current density than a single-line bare tether.