Results 71 to 80 of about 10,252 (275)

DETERMINATION OF THE EPHEMERIS ACCURACY FOR AJISAI, LAGEOS AND ETALON SATELLITES, OBTAINED WITH A SIMPLIFIED NUMERICAL MOTION MODEL USING THE ILRS COORDINATES

open access: yesOdessa Astronomical Publications, 2013
This paper describes a simplified numerical model of passive artificial Earth satellite (AES) motion. The model accuracy is determined using the International Laser Ranging Service (ILRS) highprecision coordinates. Those data are freely available on http:
I. V. Kara
doaj   +1 more source

Pulsar Timing with the Parkes Radio Telescope for the Fermi Mission [PDF]

open access: yes, 2009
We report here on two years of timing of 168 pulsars using the Parkes radio telescope. The vast majority of these pulsars have spin-down luminosities in excess of 10^34 erg/s and are prime target candidates to be detected in gamma-rays by the Fermi Gamma-Ray Space Telescope.
arxiv   +1 more source

Ephemeride der Irene [PDF]

open access: yesAstronomische Nachrichten
n ...
Rümker, G., Fröbling, O.
openaire   +2 more sources

Gravity and Radio Science Investigation at the Moons of Uranus to Reveal Subsurface Oceans and Characterize Interior Structures

open access: yesJournal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract The prospect that the five major moons of Uranus could host subsurface oceans makes them high‐priority targets for future exploration. Different techniques can be used to search for deep oceans in these objects. Here, we focus on ocean detection and characterization from measurements of the moons' response to the gravitational tides and ...
Flavio Petricca   +3 more
wiley   +1 more source

Orbits of 6 binaries [PDF]

open access: yesSerbian Astronomical Journal, 2004
In this paper the orbits of binaries WDS 10093+2020 = A 2145, WDS 21074-0814 = BU 368 AB and WDS 22288-0001 = STF 2909 AB are recalculated because of significant deviations of more recent observations from the ephemerides. For binaries WDS 22384-0754 = A
Olević Dragomir M.   +1 more
doaj   +1 more source

Ephemerides of Visual Binaries in Near-Parabolic Orbits [PDF]

open access: yesarXiv, 2020
In this paper, an algorithm for the ephemerides of visual binaries in near-parabolic orbits for either elliptic or hyperbolic case has been developed. The algorithm uses the Gauss method for determining both the true anomaly and the radial distance. Applications of the algorithm are presented for the binaries ADS 11632, WDS 19553-0644, and WDS 01243 ...
arxiv  

Ephemerides of the main Uranian satellites [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2013
International ...
N. V. Emelyanov   +2 more
openaire   +6 more sources

Seasonality and Albedo Dependence of Cloud Radiative Forcing in the Upper Colorado River Basin

open access: yesJournal of Geophysical Research: Atmospheres, Volume 130, Issue 6, 28 March 2025.
Abstract Mountains create and enhance their own clouds, which both scatter and absorb shortwave radiation from the sun and absorb and re‐emit land surface and atmospheric longwave radiation. However, the impacts of clouds on the surface radiation balance in high elevation snowy mountain terrain are poorly explored.
William Rudisill   +4 more
wiley   +1 more source

Precision Ephemerides for Gravitational-wave Searches – III. Revised system parameters of Sco X-1 [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2018
Neutron stars in low-mass X-ray binaries are considered promising candidate sources of continuous gravitational-waves. These neutron stars are typically rotating many hundreds of times a second.
Lian-tao Wang   +6 more
semanticscholar   +1 more source

PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013 [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
As BeiDou navigation system has been operational since December 2012. There is an increasing desire to use multiple constellation to improve positioning performance. The signal-in-space (SIS) anomaly caused by the ground control and the space vehicle is
Y. Wu, J. Ren, W. Liu, W. Liu
doaj   +1 more source

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