Results 21 to 30 of about 1,844,811 (291)

Predicting The Orbit of TRAPPIST-1i [PDF]

open access: yesResearch Notes of the AAS, 2018
AAS Research ...
openaire   +2 more sources

Effect of lunar gravity models on Chang'E-2 orbit determination using VLBI tracking data

open access: yesGeodesy and Geodynamics, 2016
The precise orbit determination of Chang'E-2 is the most important issue for successful mission and scientific applications, while the lunar gravity field model with big uncertainties has large effect on Chang'E-2 orbit determination.
Erhu Wei   +3 more
doaj   +1 more source

Evaluation of strategies for the ultra-rapid orbit prediction of BDS GEO satellites

open access: yesGeo-spatial Information Science, 2023
The quality of BeiDou Navigation Satellite System (BDS) Geostationary Earth Orbit (GEO) ultra-rapid products is unsatisfactory because GEO satellites are nearly stationary relative to ground stations.
Wenxi Zhao   +4 more
doaj   +1 more source

Impact of Thermospheric Mass Density on the Orbit Prediction of LEO Satellites

open access: yesSpace Weather, 2020
Many thermospheric mass density (TMD) variations have been recognized in observations and physical simulations; however, their impact on the low‐Earth‐orbit satellites has not been fully evaluated.
Changyong He   +8 more
doaj   +1 more source

Orbit Predictions for Space Object Tracked by Ground-Based Optical and SLR Stations

open access: yesRemote Sensing, 2022
In many cases, we have few optical observations over a short time span, and most of the information generated is too limited to compute a full orbit according to the angles-only method.
A. M. Abdelaziz   +4 more
doaj   +1 more source

Analysis of Orbit Accuracy for Non-cooperative Earth-Orbiting Objects

open access: yesOpen Astronomy, 2019
The atmospheric resistance and solar radiation pressure are the main sources of non-gravitational perturbations in orbit determination and prediction of non-cooperative earth-orbiting objects.
Jianrong Chen, Junfeng Li
doaj   +1 more source

An optimal design of the broadcast ephemeris for LEO navigation augmentation systems

open access: yesGeo-spatial Information Science, 2022
As the deployment of large Low Earth Orbiters (LEO) communication constellations, navigation from the LEO satellites becomes an emerging opportunity to enhance the existing satellite navigation systems.
Xueli Guo   +5 more
doaj   +1 more source

A passive satellite deorbiting strategy for medium Earth orbit using solar radiation pressure and the J(2) effect [PDF]

open access: yes, 2012
The growing population of space debris poses a serious risk to the future of space flight. To effectively manage the increase of debris in orbit, end-of life disposal has become a key requirement for future missions.
Colombo, Camilla   +2 more
core   +4 more sources

Performance of perturbation methods on orbit prediction

open access: yesMathematical and Computer Modelling, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Roberto Barrio, Sergio Serrano
openaire   +2 more sources

Partial Decryption of the GPS Extended Prediction Orbit File [PDF]

open access: yes, 2021
The paper is concerned with decoding the Extended Prediction Orbit data format file for an Assisted-GPS web-service via cypher-text only attack. We consider mandatory data content of the file and reveal the changes of this content at different moments ...
Gritsevich, Maria   +5 more
core   +1 more source

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