The Hazardous NEOs of the Future: Long-term Predictions under Uncertainty [0.03%]
未来的危险近地天体：不确定性条件下的长期预测
Oscar Fuentes-Muñoz,Davide Farnocchia,Steven R Chesley et al.
Oscar Fuentes-Muñoz et al.
Asteroid impact monitoring systems search for potential collisions of near-Earth objects (NEOs) with the Earth over 100 years. A necessary condition for an impact is the intersection between the orbit of the asteroid and the orbit of the Ea...
James A Blake,Benjamin F Cooke,Cristina Paragini et al.
James A Blake et al.
The geosynchronous (GSO) debris environment is continually evolving. Regular monitoring of the region is consequently of great importance, though the trade-off between coverage and sensitivity makes this challenging for the population of op...
Next-Generation Mars Network Position, Navigation, and Timing for Future Robotic and Human Explorers [0.03%]
下一代火星网络的位置、导航和授时技术在未来的机器人和载人探测中的应用
Margaret Rybak,Todd Ely,Eric Gustafson
Margaret Rybak
A next-generation Mars Network is investigated to determine a configuration optimized for both communications and positioning performance for surface users. A previously proposed 6000 km altitude, 3-satellite equatorial constellation that w...
Space-Based Observations of Plasma Waves During Conjunctions Between Host Sensors and Space Objects [0.03%]
伴飞传感器与空间目标交会时的等离子体波载人探测
Lauchie Scott,Paul Bernhardt,Andrew Howarth
Lauchie Scott
This study describes exploratory, in-situ experimentation to measure Very Low Frequency (VLF) plasma waves (1-35 kHz) at times when a space physics satellite equipped with a radio plasma wave receiver conjuncts with other space objects. The...
A Survey of Current Operations-Ready Thermospheric Density Models for Drag Modeling in LEO Operations [0.03%]
低地轨道操作中当前就绪的热层密度模型综述
Shaylah Mutschler,Marcin Pilinski,Sean Bruinsma et al.
Shaylah Mutschler et al.
In Low Earth Orbit (LEO), atmospheric drag is the largest contributor to trajectory prediction error. The current thermospheric density model used by the Combined Space Operations Center (CSpOC) in operations is the High Accuracy Satellite ...
Davide Farnocchia,Marco Fenucci,Fabrizio Bernardi et al.
Davide Farnocchia et al.
Discovered by the ATLAS survey on December 27, 2024, asteroid 2024 YR4 represented one of the most significant impact risks ever detected. Roughly 60 m in size, this asteroid reached a 3% probability of impacting the Earth on December 22, 2...
Jack P Leo,John P Enright
Jack P Leo
This paper presents a practical, computationally efficient approach to spacecraft angular velocity estimation using the finite difference (FD) differentiation of star tracker attitude measurements. Intended for gyro-free applications such a...
Generating Planar Trajectories for Neptunian System Exploration Using Motion Primitives [0.03%]
基于运动子的海王星系统探索平面轨迹生成方法研究
Giuliana E Miceli,Natasha Bosanac
Giuliana E Miceli
This paper uses a motion primitive approach to automatically generate constrained spacecraft trajectories for Neptunian system exploration. Motion primitives are generated as smaller building blocks of motion that summarize periodic orbits ...
Michael Krause,Ava Thrasher,Priyal Soni et al.
Michael Krause et al.
This paper documents the results from the highly successful Lunar flashlight Optical Navigation Experiment with a Star tracker (LONEStar). Launched in December 2022, Lunar Flashlight (LF) was a NASA-funded technology demonstration mission. ...
Motion Primitive Approach to Spacecraft Trajectory Design in a Multi-body System [0.03%]
基于基本运动的多体系统中航天器轨道设计方法研究
Thomas R Smith,Natasha Bosanac
Thomas R Smith
The increasing number and variety of spacecraft that are expected to operate within cislunar space and other multi-body gravitational environments throughout the solar system necessitates the continued development of strategies for rapid tr...