发表机构
Aix Marseille University; CNRS; CNES; LAM; Durham University; ONERA; Wakea Consulting; ALPAO（艾克斯-马赛大学; 法国国家科学研究中心; 法国国家空间研究中心; 拉格朗日天文实验室; 杜伦大学; 法国航空航天发展研究院; Wakea咨询公司; ALPAO公司）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
RAMA是部署于FEELINGS望远镜的新型自适应光学实验平台，采用非调制金字塔波前传感器和CNN、RL等先进控制策略，旨在克服闪烁和扩展目标观测限制，并展示了初步实验结果。
AI 中文摘要
对卫星等扩展目标的地基观测受到严重的大气传播限制。具体而言，高跟踪速度和低仰角视线会产生非平稳湍流以及强烈的闪烁效应。因此，开发稳健的波前控制策略对于维持稳定观测至关重要。在此背景下，我们介绍了RAMA，一个部署在ONERA的60厘米FEELINGS望远镜上的自适应光学（AO）测试平台。作为未来系统（如PROVIDENCE地面站）的探路者，RAMA评估了一种可见光、非调制的金字塔波前传感器（PWFS）。硬件基线还包括两个共轭于瞳孔的变形镜（DM97和DM192），由DAO实时计算机（RTC）驱动。继承PAPYRUS项目的模块化和演进理念，该平台提供了一个灵活的环境，用于在天空上测试新组件，并允许在经典控制器和先进的数据驱动策略之间进行直接比较。通过实现卷积神经网络（CNN）进行相位重建和强化学习（RL）进行环路控制，RAMA旨在克服与闪烁和扩展目标观测相关的特定限制。本文详细介绍了光机设计、平台预期波前控制性能的数值模拟、初步的实验室闭环结果以及首次与望远镜的在天光学耦合。
英文摘要
The ground-based observation of extended objects such as satellites suffer from severe atmospheric propagation constraints. Specifically, high tracking velocities and low-elevation lines of sight generate non-stationary turbulence alongside strong scintillation. Developing robust wavefront control strategies is therefore critical to maintain stable observations. In this context, we present RAMA, an adaptive optics (AO) testbench deployed on ONERA's 60\,cm FEELINGS telescope. Designed as a pathfinder for future systems like the PROVIDENCE ground station, RAMA evaluates a visible, non-modulated Pyramid Wavefront Sensor (PWFS). The hardware baseline also includes two pupil-conjugated deformable mirrors (DM97 and DM192) driven by the DAO Real-Time Computer (RTC). Inheriting the modular and evolving philosophy of the PAPYRUS project, the bench provides a flexible environment to test new components on-sky and allows for direct comparisons between classical controllers and advanced, data-driven strategies. By implementing Convolutional Neural Networks (CNN) for phase reconstruction and Reinforcement Learning (RL) for loop control, RAMA aims to overcome the specific limitations associated with scintillation and extended-object observations. This paper details the opto-mechanical design, numerical simulations of the bench expected wavefont control performance, preliminary laboratory closed-loop results and the first on-sky optical coupling with the telescope.
Comments16 pages, 15 Figures, SPIE Astronomical Telescope + Instrumentation 2026, Adaptive Optics Systems X
