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相关概念视频

Light Acquisition02:16

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...

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相关实验视频

Updated: Jun 28, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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LONEStar:月球手电筒光学导航实验

Michael Krause1, Ava Thrasher1, Priyal Soni1

  • 1Guggenheim School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA.

The journal of the astronautical sciences
|July 18, 2024
PubMed
概括

带有恒星追踪器的月球闪光灯光学导航实验 (LONEStar) 使用基于行星的光学观测成功证明了日中心导航. 它实现了瞬间和动态三角测量,推进了深空导航能力.

关键词:
图像处理 图像处理光学导航系统是指光学导航系统.太空探索 太空探索太空飞船的运行操作.三角测量是三角测量的方法.

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科学领域:

  • 太空科学 太空科学
  • 天体动力学是指天体动力学.
  • 有光学导航系统的导航系统.

背景情况:

  • 2022年12月发射的月球闪光灯 (LF) 任务是NASA技术演示.
  • 一个异常将LF重定向到日心空间,导致佐治亚理工管理的扩展任务.

研究的目的:

  • 为了展示先进的技术目标,特别是用恒星追踪器 (LONEStar) 进行的月球手电筒光学导航实验.
  • 在日中心环境中进行轨道校准和光学导航 (OPNAV) 实验.

主要方法:

  • 处理了近400张天体图像,包括恒星场,地球,月球,水星,火星,木星和土星.
  • 在轨道上对用于导航实验的光学仪器进行校准.

主要成果:

  • 在轨道上首次使用光学观测行星进行日中心导航的演示.
  • 使用LOST算法成功演示了即时三角测定,同时观测了两个行星.
  • 成功演示了动态三角测量与多个行星的连续观测.

结论:

  • LONEStar成功验证了深空中先进的光学导航技术.
  • 该实验证明了使用行星光学数据用于日心导航的可行性.