Results 61 to 70 of about 602,356 (240)
Locating the orbits delineated by tidal streams [PDF]
Mon.Not.Roy.Astron.Soc.400:548-560,2009, 2009 We describe a technique that finds orbits through the Galaxy that are consistent with measurements of a tidal stream, taking into account the extent that tidal streams do not precisely delineate orbits. We show that if accurate line-of-sight velocities are measured along a well defined stream, the technique recovers the underlying orbit through the ...
arxiv +1 more source
Precise ground state of multi-orbital Mott systems via the variational discrete action theory [PDF]
, 2022 Determining the ground state of multi-orbital Hubbard models is critical for understanding strongly correlated electron materials, yet existing methods struggle to simultaneously reach zero temperature and infinite system size. The \textit{de facto} standard is to approximate a finite dimension multi-orbital Hubbard model with a $d=\infty$ version ...
arxiv +1 more source
LEO Precise Orbit Determination with Inter-satellite Links
Remote Sensing, 2019 Traditional precise orbit determination (POD) for low Earth orbit (LEO) satellites relies on observations from ground stations and onboard receivers.
Xingxing Li +5 more
doaj +1 more source
LEO Satellite Clock Modeling and Its Benefits for LEO Kinematic POD
Remote Sensing, 2023 High-accuracy Low Earth Orbit (LEO) satellite clock and orbital products are preconditions to realize LEO augmentation for high-accuracy GNSS-based positioning on the ground.
Kan Wang, Ahmed El-Mowafy, Xuhai Yang
doaj +1 more source
Space-Time Reference with an Optical Link [PDF]
, 2015 We describe a method for realizing a high-performance Space-Time Reference (STR) using a stable atomic clock in a precisely defined orbit and synchronizing the orbiting clock to high-accuracy atomic clocks on the ground. The synchronization would be accomplished using a two-way lasercom link between ground and space.
arxiv +1 more source
Remote Sensing, 2021 The TH-2 satellite system, including the TH-2A and TH-2B, is the first distributed interferometric synthetic aperture radar (InSAR) satellite system in China.
Houzhe Zhang +6 more
semanticscholar +1 more source
Precise Orbit Determination of FY-3C with Calibration of Orbit Biases in BeiDou GEO Satellites
Remote Sensing, 2018 The emerging BeiDou navigation satellite system has contributed to global precise positioning and has recently moved toward space-borne applications.
Qiang Zhang +3 more
doaj +1 more source
Precise orbit determination technique to refine spacecraft mechanical modeling [PDF]
, 2020 The precise orbit determination of interplanetary spacecraft requires an accurate modeling of the center of mass position with respect to the antenna phase center.
Cascioli, Gael, Genova, Antonio
core +1 more source
Prospects for the Determination of Star Orbits Near the Galactic Center [PDF]
, 1999 We simulate the observations of proper motion of stars very close to the Galactic Center. We show that the speckle interferometry done with the Keck II telescope is accurate enough to obtain orbital parameters for stars with the period P about 10 y during 10 seasons of astrometric observations made once a year.
arxiv +1 more source
A Comparative Study on the Solar Radiation Pressure Modeling in GPS Precise Orbit Determination
Remote Sensing, 2021 For Global Positioning System (GPS) precise orbit determination (POD), the solar radiation pressure (SRP) is the dominant nongravitational perturbation force. Among the current SRP models, the ECOM and box-wing models are widely used in the International
Longjiang Tang +5 more
semanticscholar +1 more source