Results 21 to 30 of about 14,014 (297)

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

Towards robust aero-thermodynamic predictions for re-usable single-stage to orbit vehicles [PDF]

open access: yes, 2012
Re-usable single stage to orbit launch vehicles promise to reduce the cost of access to space, but their success will be particularly reliant on accurate and robust modelling of their aero-thermodynamic characteristics.
Abdul Ahmad   +7 more
core   +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

Fuel Consumption and Collision Avoidance Strategy in Multi-static Orbit Formations [PDF]

open access: yes, 2011
This paper analysesthe fuel consumption of interferometric rader missions employing small satellite formations like, e.g., Cross-track pendulum, Cartwheel, CarPe, or Trinodal Pendulum.
H. Fiedler   +5 more
core   +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

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   +1 more source

Radio-frequency spectroscopy of a strongly interacting spin-orbit-coupled Fermi gas [PDF]

open access: yes, 2013
We investigate experimentally and theoretically radio-frequency spectroscopy and pairing of a spin-orbit-coupled Fermi gas of 40K atoms near a Feshbach resonance at B0=202.2 G.
Zengming Meng (18997487)   +7 more
core   +1 more source

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