David Lujan,Daniel J Scheeres
David Lujan
This work presents a study of the dynamics in the vicinity of the stable L2 halo orbits in the Earth-Moon system of the circular restricted three-body problem. These solutions include partially elliptic, partially hyperbolic, and elliptic q...
Semi-Empirical Astronomical Light Pollution Evaluation of Satellite Constellations [0.03%]
卫星星座的半经验天文光污染评价
Doyle T Hall
Doyle T Hall
Several commercial organizations have recently launched or plan to launch constellations containing thousands of satellites. Such large constellations potentially adversely affect astronomical observations. This study formulates a set of in...
A Homotopic Direct Collocation Approach for Operational-Compliant Trajectory Design [0.03%]
操作合规轨迹设计的同伦直接配置方法
Alessandra Mannocchi,Carmine Giordano,Francesco Topputo
Alessandra Mannocchi
Stand-alone deep-space CubeSats are the future of the space sector. For limited budget reasons, these spacecraft need to follow operational-compliant (OC) trajectories: transfers with thrusting and coasting periods imposed at pre-defined ti...
Comparison of Deep Space Navigation Using Optical Imaging, Pulsar Time-of-Arrival Tracking, and/or Radiometric Tracking [0.03%]
基于光学成像、脉冲星到达时间法和/或射电测量的深空导航比较研究
Todd Ely,Shyam Bhaskaran,Nicholas Bradley et al.
Todd Ely et al.
Recent advances with space navigation technologies developed by NASA in space-based atomic clocks and pulsar X-ray navigation, combined with past successes in autonomous navigation using optical imaging, brings to the forefront the need to ...
John A Christian,Harm Derksen,Ryan Watkins
John A Christian
It is often necessary to identify a pattern of observed craters in a single image of the lunar surface and without any prior knowledge of the camera's location. This so-called "lost-in-space" crater identification problem is common in both ...
Maruthi R Akella
Maruthi R Akella
Fuel-Efficient Powered Descent Guidance on Large Planetary Bodies via Theory of Functional Connections [0.03%]
通过功能连接理论在大型天体上实现高效的燃油下降指引
Hunter Johnston,Enrico Schiassi,Roberto Furfaro et al.
Hunter Johnston et al.
In this paper we present a new approach to solve the fuel-efficient powered descent guidance problem on large planetary bodies with no atmosphere (e.g., Moon or Mars) using the recently developed Theory of Functional Connections. The proble...