Results 91 to 100 of about 19,555 (207)

A High-precision Dynamical Model of Callisto: Incorporating Rotation Effects within Multilayer Internal Structure Models

open access: yesThe Astrophysical Journal
China is planning to launch the “Tianwen-4” mission around the year 2030, with its aim being the exploration of Jupiter and its moon, Callisto. Within the realm of deep space exploration, the accuracy of ephemerides is of great importance.
Kai Huang   +4 more
doaj   +1 more source

De la controverse à la conversion : Venise et la défense de la rhétorique dans The Ephemerides of Phialo de Stephen Gosson

open access: yesRevue LISA, 2008
Controversy was raging in England in the late 1570s and early 1580s as Puritans attacked the evils of the age and above all the stage. Stephen Gosson is well-known for having joined the anti-theatrical polemics in his Schoole of Abuse.
Anne Geoffroy-Piscou
doaj   +1 more source

Post-Glitch RXTE-PCA Observations of the Vela Pulsar

open access: yes, 2000
We report the results of analysis of observations of the Vela Pulsar by PCA on RXTE. Our data consists of two parts. The first part contains observations at 1, 4, and 9 days after the glitch in 1996 and has 27000 sec. total exposure time. The second part
Alpar, M. Ali   +4 more
core   +1 more source

4. Ephemerides [PDF]

open access: yesTransactions of the International Astronomical Union, 1979
This Report is compiled by using the reports of the Directors of the national ephemeris offices reviewing the programs for the preparation and publication of astronomical ephemerides of variuos purposes, i.e. for astronomers and space scientists, marine and air navigators, and surveyors. Some proposals of Commission members are also included.
openaire   +1 more source

Long-term Variations in the Orbital Period of Hot Jupiters from Transit-timing Analysis Using TESS Survey Data

open access: yesThe Astrophysical Journal Supplement Series
Many hot Jupiters may experience orbital decays, which are manifested as long-term transit-timing variations. We have analyzed 7068 transits from the Transiting Exoplanet Survey Satellite (TESS) for a sample of 326 hot Jupiters.
Wenqin Wang   +5 more
doaj   +1 more source

Research on the Autonomous Orbit Determination of Beidou-3 Assisted by Satellite Laser Ranging Technology

open access: yesRemote Sensing
The Beidou Global System (BDS-3) innovatively achieves autonomous navigation using inter-satellite links (ISL) across the entire constellation, but it still faces challenges such as the limitations of the prior constraint orbital accuracy and the overall
Wei Xiao   +5 more
doaj   +1 more source

Application of "Galileo High Accuracy Service" on Single-Point Positioning. [PDF]

open access: yesSensors (Basel), 2023
Angrisano A   +4 more
europepmc   +1 more source

Commission 4: Ephemerides (Ephemerides) [PDF]

open access: yesTransactions of the International Astronomical Union, 2007
openaire   +1 more source

Global Dynamics and Ephemerides

open access: yes, 2012
When speaking of Gaia it is instructive to remember the first ESA mission dedicated to high precision astronometry HIPARRCOS launched in August 1989. HIPPARCOS can be considered as Gaia's precursor, indeed the observing strategy aspects are similar and both missions were designed specifically for high precision astronmetry. After three and a half years
Hestroffer, Daniel, David, Pedro
openaire   +2 more sources

ExoClock Project. IV. A Homogeneous Catalog of 620 Updated Exoplanet Ephemerides

open access: yesThe Astrophysical Journal Supplement Series
The ExoClock project is an open platform aiming to monitor exoplanets by integrating observations from space- and ground-based telescopes. This study presents an updated catalog of 620 exoplanet ephemerides, integrating 30,000 measurements from ground ...
A. Kokori   +325 more
doaj   +1 more source

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