Results 131 to 140 of about 26,090 (296)
Ecology and Evolution, Volume 15, Issue 2, February 2025.Our study shows that the landscape‐scale environmental gradient represented as ecotone and as local environmental factors can alternately determine the spatial structures of the floodplain biota across seasons. The study highlights the understudied yet important linkages of spatial and temporal biotic assemblages and advance understanding of ecology ...
Hiromi Uno +5 more
wiley +1 more source
Galileo Single Point Positioning Assessment Including FOC Satellites in Eccentric Orbits
Remote Sensing, 2019 On August 2016, the Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. As the Galileo constellation is not yet complete. It is very important to have two more satellites available since the
Umberto Robustelli, Giovanni Pugliano
doaj +1 more source
Tests of GR with INPOP15a planetary ephemerides: estimations of possible supplementary advances of perihelia for Mercury and Saturn [PDF]
arXiv, 2016 Planetary ephemerides are a good tool for studying general relativity at the scale of our solar system. We present here new evaluations of advances of perihelia for Mercury and Saturn.
arxiv
Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.Abstract During Juno's close flybys of Io in 2023 and 2024, its low‐light sensitive Stellar Reference Unit (SRU) was used to conduct a high‐resolution visible wavelength (450–1,100 nm) imaging campaign under Jupiter‐shine illumination. The SRU acquired Juno's highest resolution image of Io's surface (895–1,230 m/pixel) in December 2023 at a high ...
Heidi N. Becker +11 more
wiley +1 more source
, 2007 The general relativistic Lense-Thirring precessions of the perihelia of the inner planets of the Solar System are about 10^-3 arcseconds per century. Recent improvements in planetary orbit determination may yield the first observational evidence of such ...
Adelberger +54 more
core +1 more source
Ephemerides and Celestial Mechanics [PDF]
Highlights of Astronomy, 1986 When solving some abstract problems in mechanics related to the dynamics of bodies and systems, the notion of an inertial frame of reference is introduced in an apparently clear and natural way by simply drawing its coordinate axes and then paying no further attention to the system of reference which is then taken for granted.
openaire +2 more sources
Space Weather, Volume 23, Issue 2, February 2025.Abstract With the onset of solar activities of the 25th solar cycle, ionospheric perturbations have become increasingly frequent, posing significant challenges to various applications of Global Navigation Satellite Systems (GNSS). The Rate of Total Electron Content (TEC) Index (Rate of TEC Index (ROTI)), commonly derived from GNSS data sampled at 30‐s ...
Zhouyu Zhang +6 more
wiley +1 more source
Odessa Astronomical Publications, 2016 Formulae for determination of planetocentric positions of the basic photometrical circles on the surface of the spherical planet (the equator of intensity, an orthographic limb and orthographic terminator) from the elements of these circles specified to ...
V. V. Mikhalchuk
doaj +1 more source