Results 31 to 40 of about 43,513 (282)

SEA WAVE DIAGNOSTICS BY RADIO EMISSIONS FROM ARTIFICIAL EARTH SATELLITES IN DIFFERENT FREQUENCY BANDS [PDF]

Radio Physics and Radio Astronomy
Subject and Purpose. The present paper is concerned with sea wave diagnostics by signals from artificial satellites in a bistatic radar scheme using the grazing radio-wave propagation and a diffuse component of the signal reflected off the sea surface ...
V. B. Zamaraev, Yu. A. Pedenko, V. B. Sinitsky   +2 more
doaj   +1 more source

CALCULATION AND MAPPING OF TIDAL LUNAR IMPACTS ON THE EARTH SPHEROID

InterCarto. InterGIS, 2017
The major method used in this study is processing of data arrays in order to obtain statistical data. Statistical methods of research use the parameter of frequency to characterize the recurrence of events in time and space.
O. V. Zenkin
doaj   +1 more source

Discovery of periodic dips in the light curve of GX 13+1: the X-ray orbital ephemeris of the source [PDF]

, 2013
The bright low-mass X-ray binary (LMXB) GX 13+1 is one of the most peculiar Galactic binary systems. A periodicity of 24.27 d with a formal statistical error of 0.03 d was observed in its power spectrum density obtained with RXTE All Sky Monitor (ASM ...
Burderi, L., D'Ai, A., Di Salvo, T., Iaria, R., Riggio, A., Robba, N. R.   +5 more
core   +2 more sources

Elements and ephemeris of comet 1896a

The Astronomical Journal, 1896
William J. Hussey
openalex   +4 more sources

Ephemeris of the Satellites of Uranus [PDF]

Monthly Notices of the Royal Astronomical Society, 1870
A. Marth
openalex   +4 more sources

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

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

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

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

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