電波観測による軌道決定
| Autor: | Ichikawa, Tsutomu |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | 第17回アストロダイナミクスシンポジウム講演後刷り集 2007 = Proceedings of 17th Workshop on JAXA Astrodynamics and Flight Mechanics. :6-11 |
| Popis: | 電波航法、即ちレンジ、ドップラー観測に基づく軌道決定は一般的には多次元で重み付き最小自乗法を用いて推定を行う。しかしながら惑星間および惑星近傍での弾道軌道における軌道推定は逐次型のフィルタを用い次元低下させてモデルの誤差源を明確にすることで推定精度の向上化が図れる。本論ではこの低次元化フィルタを提案し電波観測に対する軌道推定の精度についてとシミュレーションによる金星エンカウンター近傍での評価をしたことについて論じる。 The error budget analysis is presented which quantifies the effects of different error sources in the Earth-based orbit determination process when the orbit estimation filter is used to reduce radio metric data. The estimator strategy differs from more traditional filtering methods in the nearly all of the principal ground system calibration errors affecting the data are represented as filter parameters. Error budget computations were performed for a Venus mission interplanetary cruise scenario for cases in which only X-band Doppler data were used to determine the spacecraft's orbit, X-band ranging data were used exclusively, and combined set in which the ranging data were used in addition to the Doppler data. Random nongravitational accelerations were found to the largest source of error contributing to the individual error budgets. 資料番号: AA0063718002 |
| Databáze: | OpenAIRE |
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