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Angles-only relative orbit determination in low earth orbit

机译：低地球轨道中仅角度的相对轨道确定

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The paper provides an overview of the angles-only relative orbit determination activities conducted to support the Autonomous Vision Approach Navigation and Target Identification (AVANTI) experiment. This in-orbit endeavor was carried out by the German Space Operations Center (DLR/GSOC) in autumn 2016 to demonstrate the capability to perform spaceborne autonomous close-proximity operations using solely line-of-sight measurements. The images collected onboard have been reprocessed by an independent on-ground facility for precise relative orbit determination, which served as ultimate instance to monitor the formation safety and to characterize the onboard navigation and control performances. During two months, several rendezvous have been executed, generating a valuable collection of images taken at distances ranging from 50 km to only 50 m. Despite challenging experimental conditions characterized by a poor visibility and strong orbit perturbations, angles-only relative positioning products could be continuously derived throughout the whole experiment timeline, promising accuracy at the meter level during the close approaches. The results presented in the paper are complemented with former angles-only experience gained with the PRISMA satellites to better highlight the specificities induced by different orbits and satellite designs.
机译：本文概述了为支持自主视觉进近导航和目标识别（AVANTI）实验而进行的仅角度相对轨道确定活动。这项在轨工作是由德国太空运行中心（DLR / GSOC）于2016年秋季进行的，旨在展示仅使用视线测量即可执行星空自主近距离运行的能力。船上收集的图像已经由独立的地面设施进行了重新处理，以进行精确的相对轨道确定，这是监视地层安全性并表征船上导航和控制性能的最终实例。在两个月的时间里，已经执行了几次会合，生成了从50？km到仅50？m距离拍摄的有价值的图像集合。尽管以恶劣的可见性和强烈的轨道扰动为特征的实验条件艰巨，但在整个实验时间轴上都可以连续得出仅角度的相对定位乘积，有望在近距离测量中达到米级精度。本文介绍的结果与PRISMA卫星以前获得的仅有角度的经验相辅相成，以更好地突出不同轨道和卫星设计引起的特殊性。

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