OSIRIS4CubeSat 上的采集和跟踪在轨演示。

IF 3.2 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2024-11-04 DOI:10.1364/OE.537889
René Rüddenklau, Fabian Rein, Christian Roubal, Benjamin Rödiger, Christopher Schmidt
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引用次数: 0

摘要

OSIRIS4CubeSat 是 0.3 个单元内最小的商用激光通信终端。它作为 PIXL-1 号发射到太空的 3 单元立方体卫星内,以演示直接与地球的光链路。这项工作主要侧重于调试阶段,特别强调主动式精细指向和跟踪机制的性能。该转向机制的视场半径为 1 度,在补偿卫星姿态确定和控制系统的指向误差方面起着决定性作用。报告介绍了开环采集和闭环跟踪的设计和验证。反馈传感器通过自适应增益控制,适应直达地球链路过程中信标功率水平的变化。随后,利用从部署的立方体卫星上获得的遥测记录对卫星通过情况进行评估,结果表明其性能优越,符合链路预算的指向要求。通过使用开发的控制回路逻辑,OSIRIS4CubeSat 实现了 71 µrad 的平均跟踪误差,在 238 pW 的低功率水平下,3σ 偏差为 140 µrad。这些结果是对 OSIRIS4CubeSat 的验证,证明其有能力实现从低地球轨道到地球表面的高速数据传输,数据传输速率高达 100 Mbit/s。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
In-orbit demonstration of acquisition and tracking on OSIRIS4CubeSat.

OSIRIS4CubeSat is the smallest commercially available laser communication terminal within the confines of 0.3-units. It was launched as PIXL-1 inside of a 3-unit CubeSat into space to demonstrate optical direct to earth links. This work primarily focuses on the commissioning phase, particularly emphasizing the performance of the active fine pointing and tracking mechanism. This steering mechanism, with a 1 degree radius field of regard, plays a decisive role in compensating for pointing inaccuracies from the satellite's attitude determination and control system. The design and validation of open-loop acquisition and closed-loop tracking are presented. The feedback sensor adapts to changing beacon power levels, that occur during a direct to earth link, by an adaptive gain control. Subsequent evaluation of satellite passes, with telemetry recordings obtained from the deployed CubeSat, showcases superior performance that meets the pointing requirements of the link budget. By using the developed control-loop logic, OSIRIS4CubeSat achieves a mean tracking error of 71 µrad, with a 3σ deviation of 140 µrad down to low power levels of 238 pW. These results serve as validation of OSIRIS4CubeSat, demonstrating its capability to enable high-speed data transmission from low Earth orbit to the Earth's surface at data rates of up to 100 Mbit/s.

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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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