The paper deals with the analysis of trajectory determination of collocate geostationary satellite through optical devices. Has been considered as study case a formatioo of Eutelsat satellites that has been photographed during observation campaign of June-July 2013 carried out from the space debris observatory of the University of Rome "La Sapienza". In particular the images have been used to perform accurate orbit determination and residuals with respect to Two Line Elements have been achieved. These kind of system for trajectory determination represent a valuable substitute to active orbit determination in case of failure and are of absolute importance for the operative life of the spacecraft in case of closing approach with unknown or debris orbiting objects that usually have not the manoeuvring capability.
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机译：本文通过光学装置对定位对地静止卫星的轨迹确定进行了分析。已被视为研究案例，它是从2013年6月至7月在罗马大学“ La Sapienza”空间碎片天文台进行的观察运动中拍摄到的Eutelsat卫星的格式。特别地，图像已经被用于执行精确的轨道确定，并且已经获得了关于两个线元的残差。在发生故障的情况下，这种用于轨迹确定的系统代表了主动轨道确定的有价值的替代方法，并且对于具有未知或碎片轨道物体但通常不具有机动能力的接近方法而言，对于航天器的使用寿命至关重要。
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