Results 1 to 10 of about 3,161,815 (352)

Precise Orbit Determination of MEX Flyby Phobos Using Simulated Radiometric and Image Data [PDF]

open access: yesSensors, 2021
A navigation camera or topography camera is a standard payload for deep space missions and the image data are normally used for auto-navigation. In this work, we study the potential contribution of image data in precise orbit determination for deep space
Xinbo Zhu   +5 more
doaj   +2 more sources

Adaptive and Dynamically Constrained Process Noise Estimation for Orbit Determination. [PDF]

open access: yesIEEE Trans Aerosp Electron Syst, 2021
This article introduces two new algorithms to accurately estimate the process noise covariance of a discrete-time Kalman filter online for robust orbit determination in the presence of dynamics model uncertainties.
Stacey N, D'Amico S.
europepmc   +3 more sources

Unidirectional Orbit Determination for Extended Users Based on Navigation Ka-Band Inter-Satellite Links [PDF]

open access: yesSensors
Traditional spacecraft orbit determination primarily employs two methodologies: ground station/survey ship-based orbit determination and global navigation satellite system (GNSS)-based orbit determination.
Yong Shangguan   +6 more
doaj   +2 more sources

A review of real-time multi-GNSS precise orbit determination based on the filter method

open access: yesSatellite Navigation, 2022
Stable and reliable high-precision satellite orbit products are the prerequisites for the positioning services with high performance. In general, the positioning accuracy depends strongly on the quality of satellite orbit and clock products, especially ...
Yidong Lou   +7 more
doaj   +2 more sources

Precise Orbit Determination of Mars-crossing Asteroids

open access: goldThe Astronomical Journal
This study investigates the orbit determination of the Mars-crossing asteroids (MCAs) with a focus on the possibility of detecting their Yarkovsky signals. We analyze the influences of force model uncertainties on MCA orbits, including the uncertainty of
Xin Liu   +6 more
doaj   +2 more sources

New-Generation BeiDou (BDS-3) Experimental Satellite Precise Orbit Determination with an Improved Cycle-Slip Detection and Repair Algorithm. [PDF]

open access: yesSensors (Basel), 2018
Currently, five new-generation BeiDou (BDS-3) experimental satellites are working in orbit and broadcast B1I, B3I, and other new signals. Precise satellite orbit determination of the BDS-3 is essential for the future global services of the BeiDou system.
Hu C   +3 more
europepmc   +2 more sources

Real-Time Orbit Determination of Micro–Nano Satellite Using Robust Adaptive Filtering [PDF]

open access: yesSensors
Low-performing GPS receivers, often used in challenging scenarios such as attitude maneuver and attitude rotation, are frequently encountered for micro–nano satellites.
Jing Chen   +5 more
doaj   +2 more sources

Overview on Space-Based Optical Orbit Determination Method Employed for Space Situational Awareness: From Theory to Application [PDF]

open access: goldPhotonics
Leveraging space-based optical platforms for space debris and defunct spacecraft detection presents several advantages, including a wide detection range, immunity to cloud cover, and the ability to maintain continuous surveillance on space targets.
Zhe Zhang   +6 more
doaj   +2 more sources

Perturbed initial orbit determination [PDF]

open access: yesAstrodynamics, 2023
An algorithm for robust initial orbit determination (IOD) under perturbed orbital dynamics is presented. By leveraging map inversion techniques defined in the algebra of Taylor polynomials, this tool returns a highly accurate solution to the IOD problem ...
Alberto Fossà, M. Losacco, R. Armellin
semanticscholar   +1 more source

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