Results 81 to 90 of about 5,627 (172)

On the comparison of fundamental numerical ephemerides [PDF]

, 2013
We present the results of our comparison of three main numerical ephemerides (DELE, INPOP, EPM) for the determination of precision and errors of their dynamical coordinate systems.
Choliy, V.Ya., Tkachuk, V.V.
core   +2 more sources

A 16-parameter GEO Broadcast Ephemeris [PDF]

Journal of Geodesy and Geoinformation Science, 2018
Currently, the broadcast ephemerides used in GEOs are same as those of the MEOs and IGSOs in the BeiDou navigation constellation. However, a trade-off strategy, i.e.
Zhongkai ZHANG,Lan DU,Li LIU,Feng HE,Yu LU,Peiyuan ZHOU
doaj  

PERIOD CHANGE IN THE CONTACT SYSTEM AW UMA

Odessa Astronomical Publications, 2017
Nine new minima were determined from the UBV photoelectric observations obtained in 1992 and 1995-6. They were used to derive the new ephemerides of AW UMa. The mid-eclipse brightening best visible in U colour was detected.
T. Pribulla, D. Chochol
doaj   +1 more source

Ephemerides nacionaes

, 1881
Inclui índice alphabetico das "Ephemerides Nacionaes".Blake, Sacramento. Diccionario bibliographico brazileiro. Rio de Janeiro: Imprensa Nacional, 1883-1902. v. 4, p. 271-273.Colligidas pelo Dr. J. A. Teixeira de Mello e publicadas na Gazeta de NoticiasT.
Mello, José Alexandre Teixeira de, 1833-1907
core  

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

The 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, Yongzhang Yang, Yuhao Chen, Yining Zhang, Yuqiang Li   +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

Revue 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

Cometary ephemerides - needs and concerns [PDF]

, 1981
With the use of narrow field-of-view instrumentation on faint comets, the accuracy requirements upon computed ephemerides are increasing. It is not uncommon for instruments with a one arc minute field-of-view to be tracking a faint comet that is not ...
Yeomans, D. K.
core  

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

The 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, Zixin Zhang, Zhangliang Chen, Yonghao Wang, Cong Yu, Bo Ma   +5 more
doaj   +1 more source

Precision GPS ephemerides and baselines [PDF]

, 1992
The emphasis of this grant was focused on precision ephemerides for the Global Positioning System (GPS) satellites for geodynamics applications. During the period of this grant, major activities were in the areas of thermal force modeling, numerical ...

core  

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

Remote 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, Zhengcheng Wu, Zongnan Li, Lei Fan, Shiwei Guo, Yilun Chen   +5 more
doaj   +1 more source