Results 31 to 40 of about 43,155 (284)

Astrometry of mutual approximations between natural satellites. Application to the Galilean moons [PDF]

, 2016
Typically we can deliver astrometric positions of natural satellites with errors in the 50-150 mas range. Apparent distances from mutual phenomena, have much smaller errors, less than 10 mas. However, this method can only be applied during the equinox of
Assafin, M., Camargo, J. I. B., Dias-Oliveira, A., Gomes-Júnior, A. R., Morgado, B., Vieira-Martins, R.   +5 more
core   +1 more source

Constraint on the Yukawa suppression of the Newtonian potential from the planetary ephemeris INPOP19a [PDF]

, 2020
We use the latest solution of the ephemeris INPOP (19a) in order to improve our previous constraint on the existence of a Yukawa suppression to the Newtonian potential, generically associated to a graviton's mass.
L. Bernus, O. Minazzoli, A. Fienga, M. Gastineau, J. Laskar, P. Deram, A. Di Ruscio   +6 more
semanticscholar   +1 more source

TASTE IV. Refining ephemeris and orbital parameters for HAT-P-20b and WASP-1b [PDF]

, 2014
We present four new light curves of transiting exoplanets WASP-1b and HAT-P-20b, observed within the TASTE (The Asiago Search for Transit timing variations of Exoplanets) project.
Bedin, L. R., Borsato, L., Cunial, A., Damasso, M., Granata, V., Malavolta, L., Nascimbeni, V., Piotto, G.   +7 more
core   +1 more source

La puesta en escena de la efeméride provincial de Andrés Guacurarí y Artigas. Aportes desde una mirada semiótica-comunicacional

Clio y Asociados, 2017
The commemoration of the ephemeris in the school offers us one of the fundamental spaces in which the senses of the nation are narrated. At present we observe that in the province of Misiones, similar strategies were implemented to build ...
María Itatí Rodríguez
doaj   +1 more source

A Smart Realtime Service to Broadcast the Precise Orbits of GPS Satellite and Its Performance on Precise Point Positioning

Sensors, 2020
At present, Global Position System (GPS) navigation ephemeris mainly broadcasts satellite orbits with meter-level precision for standard point positioning and precise relative positioning. With the rapid development of real-time precise point positioning
Dehai Li, Wei Yan, Jinzhong Mi, Yamin Dang, Yunbin Yuan, Xingli Gan   +5 more
doaj   +1 more source

Updating the orbital ephemeris of the dipping source XB 1254-690 and the distance to the source [PDF]

, 2017
XB 1254-690 is a dipping low mass X-ray binary system hosting a neutron star and showing type I X-ray bursts. We aim at obtaining more accurate orbital ephemeris and at constraining the orbital period derivative of the system for the first time.
Burderi, L., Di Salvo, T., Gambino, A. F., Iaria, R., Matranga, M., Pintore, F., Riggio, A., Sanna, A.   +7 more
core   +5 more sources

Analysis of Solar and Lunar Motions in the Seonmyeong Calendar

Journal of Astronomy and Space Sciences, 2019
We investigate solar and lunar motions in the Seonmyeong (SM) calendar that was compiled by Xu, Ang of the Tang dynasty (A.D. 618-907) in China and used for 71 years from 822 to 892.
Ki-Won Lee
doaj   +1 more source

Validation of Geostationary Earth Orbit Satellite Ephemeris Generated

Journal of Astronomy and Space Sciences, 2018
This study presents the generation and accuracy assessment of predicted orbital ephemeris based on satellite laser ranging (SLR) for geostationary Earth orbit (GEO) satellites.
Hyungjik Oh, Eunseo Park, Hyung-Chul Lim, Sang-Ryool Lee, Jae-Dong Choi, Chandeok Park   +5 more
doaj   +1 more source

Analysis and Assessment of BDS-2 and BDS-3 Broadcast Ephemeris: Accuracy, the Datum of Broadcast Clocks and Its Impact on Single Point Positioning

Remote Sensing, 2020
For the global ordinary users, the broadcast ephemeris plays important roles in positioning, navigation and timing (PNT) services. With the construction of a new generation of the BeiDou navigation satellite system (BDS), the development of BDS has ...
G. Jiao, Shuli Song, Yangyang Liu, Ke Su, N. Cheng, Shengli Wang   +5 more
semanticscholar   +1 more source

A long‐term broadcast ephemeris model for extended operation of GNSS satellites

, 2021
GNSS positioning relies on orbit and clock information, which is predicted on the ground and transmitted by the individual satellites as part of their broadcast navigation message.
O. Montenbruck, P. Steigenberger, Moritz Aicher   +2 more
semanticscholar   +1 more source