Results 31 to 40 of about 4,565,671 (287)

Research on the Effectiveness of Different Estimation Algorithm on the Autonomous Orbit Determination of Lagrangian Navigation Constellation

International Journal of Aerospace Engineering, 2016
The accuracy of autonomous orbit determination of Lagrangian navigation constellation will affect the navigation accuracy for the deep space probes. Because of the special dynamical characteristics of Lagrangian navigation satellite, the error caused by ...
Youtao Gao, Junkang Chen, Bo Xu, Jianhua Zhou   +3 more
doaj   +1 more source

Short-Arc Association and Orbit Determination for New GEO Objects with Space-Based Optical Surveillance

Aerospace, 2021
For Geosynchronous Earth Orbit (GEO) objects, space-based optical surveillance has advantages over regional ground surveillance in terms of both the timeliness and space coverage.
Jian Huang, Xiangxu Lei, Guangyu Zhao, Lei Liu, Zhenwei Li, Hao Luo, Jizhang Sang   +6 more
doaj   +1 more source

Importance of adding perturbations in the optimized boundary value initial orbit determination using shooting method [PDF]

, 2021
Space debris is becoming a major threat for functionalspacecraft. Since, out of thousands of tracked objects inthe Earth’s orbits, only a small percentage correspondsto the operational satellites.
Schildknecht, T., Mann, H. K., Vananti, A.   +2 more
core  

Direct Initial Orbit Determination

IEEE Transactions on Aerospace and Electronic Systems
Initial orbit determination (IOD) is an important early step in the processing chain that makes sense of and reconciles the multiple optical observations of a resident space object. IOD methods generally operate on line-of-sight (LOS) vectors extracted from images of the object, hence the LOS vectors can be seen as discrete point samples of the raw ...
Chee-Kheng Chng, Trent Jansen-Sturgeon, Timothy Payne, Tat-Jun Chin   +3 more
openaire   +3 more sources

Non-Cooperative LEO Satellite Orbit Determination Using Single Station for Space-Based Opportunistic Positioning

Remote Sensing
Space-based opportunistic positioning is a crucial component of resilient positioning, navigation, and timing (PNT) systems, and it requires the acquisition of orbit information for non-cooperative low Earth orbit (LEO) satellites.
Ruofan Deng, Honglei Qin, Yu Zhang
doaj   +1 more source

Precise Orbit Determination for BeiDou GEO/IGSO Satellites during Orbit Maneuvering with Pseudo-Stochastic Pulses

Remote Sensing, 2019
In order to provide better service for the Asia-Pacific region, the BeiDou navigation satellite system (BDS) is designed as a constellation containing medium earth orbit (MEO), geostationary earth orbit (GEO), and inclined geosynchronous orbit (IGSO ...
Zhiwei Qin, Guanwen Huang, Qin Zhang, Le Wang, Xingyuan Yan, Shichao Xie, Yu Cao, Xiaolei Wang   +7 more
doaj   +1 more source

Initial Orbit Determination for the CR3BP using Particle Swarm Optimization

CoRR, 2022
This work utilizes a particle swarm optimizer (PSO) for initial orbit determination for a chief and deputy scenario in the circular restricted three-body problem (CR3BP). The PSO is used to minimize the difference between actual and estimated observations and knowledge of the chief's position with known CR3BP dynamics to determine the deputy's initial ...
David Zuehlke, Taylor Yow, Daniel Posada, Joseph Nicolich, Christopher W. Hays, Aryslan Malik, Troy Henderson   +6 more
openaire   +2 more sources

Shooting method to allow for perturbations in the optimized boundary value initial orbit determination [PDF]

, 2020
Space debris poses threats to functional spacecraft around the Earth due to the possibility of collisions in orbit. The debris object population needs to be cataloged to monitor the space environment.
Schildknecht, Thomas, Vananti, Alessandro, Mann, Harleen Kaur   +2 more
core  

Research on Sliding-Window Batch Processing Orbit Determination Algorithm for Satellite-to-Satellite Tracking

Aerospace
In response to the increasing demand for high-precision navigation of satellites operating in the cislunar space, this study introduces an onboard orbit determination algorithm considering both convergence and computational efficiency, referred to as the
Yingjie Xu, Xuan Feng, Shuanglin Li, Jinghui Pu, Shixu Chen, Wenbin Wang   +5 more
doaj   +1 more source

On initial orbit determination

The Astronomical Journal, 1984
The classical methods of initial orbit determination are brought together within a larger viewpoint. This new synthesis stresses that all such techniques follow one of three approaches. Either they seek to compute the orbital element set, or its equivalent, by attacking the differential equations of motion (Laplace), the first integrals of the ...
openaire   +1 more source