### 抜粋

Space Situational Awareness (SSA) has been recognized to be important for the safe space activities including these problems. As low-thrust propulsion technology becomes increasingly popular, SSA for low-thrust spacecraft may become an area of increasing interest. More frequently use of low-thrust propulsion to place satellites in orbit create more opportunities for collisions and radio frequency interference as these spacecraft travel slowly through altitude ranges. The purpose of this paper is to develop a method for estimation of the mean orbital elements for low-thrust spacecraft. To overcome the instability of the estimation problem with low-thrust acceleration, we estimate the mean elements instead of osculating elements. By use of the averaging technique, Hudson and Scheeres (2009) proposed an analytical model of secular variations of orbital elements under thrust acceleration. The resulting averaged equation has a nice property in which only finite number of Fourier coefficients of the thrust acceleration appear because of the orthogonality of the trigonometric function. Based on the nonlinear state equation representation for the extended state variable which include not only orbital elements but also unknown Fourier coefficients, mean orbital elements and thrust history are estimated from observation data of mean orbital elements. Moreover, the mapping from mean to osculating elements is derived which can be replaced by a measurement equation. Proposed method is demonstrated through numerical simulations

元の言語 | 英語 |
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ホスト出版物のタイトル | 65th International Astronautical Congress 2014, IAC 2014: Our World Needs Space |

出版者 | International Astronautical Federation, IAF |

ページ | 4645-4655 |

ページ数 | 11 |

巻 | 7 |

ISBN（電子版） | 9781634399869 |

出版物ステータス | 出版済み - 2014 |

イベント | 65th International Astronautical Congress 2014: Our World Needs Space, IAC 2014 - Toronto, カナダ 継続期間: 9 29 2014 → 10 3 2014 |

### その他

その他 | 65th International Astronautical Congress 2014: Our World Needs Space, IAC 2014 |
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国 | カナダ |

市 | Toronto |

期間 | 9/29/14 → 10/3/14 |

### All Science Journal Classification (ASJC) codes

- Space and Planetary Science
- Aerospace Engineering
- Astronomy and Astrophysics

## フィンガープリント Estimation of mean orbital elements with unknown low-thrust acceleration' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

## これを引用

*65th International Astronautical Congress 2014, IAC 2014: Our World Needs Space*(巻 7, pp. 4645-4655). International Astronautical Federation, IAF.