Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides
Navigation, 2021 The availability of orbit information with high precision and low latency is a key requirement for many Earth-observation missions, predominantly in the field of radio occultation.
A. Hauschild, O. Montenbruck
semanticscholar +1 more source
UTC and GNSS system time access using PPP with broadcast ephemerides
GPS Solutions, 2022 The application of precise point positioning with broadcast ephemerides (PPP-BCE) is discussed as an alternative to the established all-in-view technique for multi-GNSS time transfer.
L. Carlin +3 more
semanticscholar +1 more source
Revisiting the 2PN Pericenter Precession in View of Possible Future Measurements
Universe, 2020 At the second post-Newtonian (2PN) order, the secular pericenter precession ω ˙ 2 PN of either a full two-body system made of well-detached non-rotating monopole masses of comparable size and a restricted two-body system composed of a point
Lorenzo Iorio
doaj +1 more source
Mobile laser scanning elevation data accuracy in closed and partially open sky area
Geodesy and Cartography, 2021 Mobile laser scanning is being used more often in Estonia and abroad to obtain geospatial information. As the system is still new and being upgraded, different methods are being used to find out how accurately the mobile laser scanner can measure in ...
Gerly Annok, Valdar Tammin, Natalja Liba
doaj +1 more source
Revisiting theKeplerfield withTESS: Improved ephemerides usingTESS2 min data [PDF]
, 2021 Up to date planet ephemerides are becoming increasingly important as exoplanet sciencemoves from detecting exoplanets to characterising their architectures and atmospheres in depth.
M. Battley +3 more
semanticscholar +1 more source
Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s Method
Journal of Astronomy and Space Sciences, 2020 This paper presents a methodology for Initial Orbit Determination (IOD) based on a modification of the Laplace’s geocentric method. The orbital elements for Near-Earth asteroids (1864) Daedalus, 2003 GW, 2019 JA8, a Hungaria-type asteroid (4690 ...
Daniela Espitia +2 more
doaj +1 more source
Under-Developed and Under-Utilized Eclipsing Binary Model Capabilities [PDF]
Journal of Astronomy and Space Sciences, 2012 Existing but largely unused binary star model capabilities are examined. An easily implemented scheme is parameterization of starspot growth and decay that can stimulate work on outer convection zones and their dynamos.
R. E. Wilson
doaj +1 more source
Modeling the Uncertainties of Solar System Ephemerides for Robust Gravitational-wave Searches with Pulsar-timing Arrays [PDF]
Astrophysical Journal, 2020 The regularity of pulsar emissions becomes apparent once we reference the pulses’ times of arrivals to the inertial rest frame of the solar system.
M. Vallisneri +68 more
semanticscholar +1 more source
Ephemerides of the Irregular Saturnian Satellites from Earth-based Astrometry and Cassini Imaging
Astronomical Journal, 2022 We report a new determination of the orbits of the irregular Saturnian satellites. We fit their numerically integrated orbits to a data set containing Earth-based observations and imaging data from the Cassini spacecraft. We include the statistics of the
R. Jacobson +4 more
semanticscholar +1 more source
Refining the Transit-timing and Photometric Analysis of TRAPPIST-1: Masses, Radii, Densities, Dynamics, and Ephemerides [PDF]
The Planetary Science Journal, 2020 We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST, and K2 transit-time measurements, and revisit an N-body dynamical analysis of the seven-planet system using our
E. Agol +34 more
semanticscholar +1 more source