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Achievable orbit determination and prediction accuracy using short-arc space-based observations of space debris

机译：利用空间碎片的短弧空基观测可实现的轨道确定和预测精度

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The space-based space surveillance (SBSS) technique is promising in the current and future space surveillance with advantages of global coverage, high covering rate, and strong exploring capacity. This paper focuses on the key problems of this new technique, the accurate orbit determination (OD) and prediction (OP) using short-arc tracking data. 200 debris objects are simulated to be tracked by the satellite in a sun-synchronous orbit. The real-time OD using short-arc space-based optical data of debris from only one pass is performed, and an OP accuracy of 10 '' for angles and 100 m for distances over 150 s OP arc is achieved, which is accurate for the pointing guidance of blind space-based lasers operation. The OD/OP performances using multiple passes of short-arc space-based optical data are also assessed. Using at least 2 passes of 120 s short-arc space-based optical data, separated by about 24 h, the determined position accuracy is better than 50 m, and the subsequent 7-day position prediction errors are less than 300 m, which is believed sufficient enough for space applications requiring high accuracy, like the orbit catalogue maintenance, space conjunction analysis for hundreds of thousands of debris. (C) 2018 COSPAR. Published by Elsevier Ltd. All rights reserved.
机译：天基空间监视（SBSS）技术在当前和未来的空间监视中具有广阔的前景，具有覆盖范围广，覆盖率高和探索能力强的优点。本文着重研究这种新技术的关键问题，即使用短弧跟踪数据的精确轨道确定（OD）和预测（OP）。模拟了200个碎片对象，卫星将在太阳同步轨道上对其进行跟踪。使用仅一次通过的碎片的短弧空基光学数据进行实时OD，并且OP精度对于角度为10英寸，对于150 s以上的距离为100 m，OP弧是准确的空天基激光操作的瞄准指导。还评估了使用短弧空基光学数据多次通过的OD / OP性能。使用至少两遍120 s短弧空基光学数据，相隔约24 h，确定的位置精度优于50 m，随后的7天位置预测误差小于300 m，这是据信足以满足要求高精度的太空应用的需求，例如轨道目录维护，数十万个碎片的空间合一分析。 （C）2018年COSPAR。由Elsevier Ltd.出版。保留所有权利。

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