Results 11 to 20 of about 41,139 (300)
Remote Sensing, 2021 With the rapid development and gradual perfection of GNSS in recent years, improving the real-time service performance of GNSS has become a research hotspot. In GNSS single-point positioning, broadcast ephemeris is used to provide a space–time reference.
Hanlin Chen +5 more
doaj +2 more sources
An optimal design of the broadcast ephemeris for LEO navigation augmentation systems
Geo-spatial Information Science, 2022 As the deployment of large Low Earth Orbiters (LEO) communication constellations, navigation from the LEO satellites becomes an emerging opportunity to enhance the existing satellite navigation systems.
Xueli Guo +5 more
doaj +2 more sources
Remote Sensing, 2022 Since BeiDou Navigation Satellite System (BDS) and Japan’s Quasi-Zenith Satellite System (QZSS) have more visible satellites in the Asia-Pacific region, and navigation satellites of Global Positioning System (GPS), Galileo satellite navigation system ...
Mengyuan Li +4 more
doaj +2 more sources
Study on Optimal Broadcast Ephemeris Parameters for GEO/IGSO Navigation Satellites
Sensors, 2020 This paper proposes new sets of suitable broadcast ephemeris parameters for geosynchronous (GEO) and inclined geosynchronous (IGSO) navigation satellites (NSs).
Jin Haeng Choi +3 more
doaj +2 more sources
Broadcast Ephemeris with Centimetric Accuracy: Test Results for GPS, Galileo, Beidou and Glonass
Remote Sensing, 2021 Here we test the capability of the Broadcast Ephemeris Message, in both its GPS-like (Keplerian ellipse with secular and periodic perturbations) and Glonass-like (numerical integration of a 9D state vector) formats, to reproduce a corresponding precise ...
Alessandro Caporali, Joaquin Zurutuza
doaj +2 more sources
Improving BDS broadcast ephemeris accuracy using ground-satellite-link observations
Satellite Navigation, 2022 The BeiDou Navigation Satellite System (BDS) employs a hybrid constellation including GEO (Geosynchronous Earth Orbit), IGSO (Inclined Geosynchronous Orbit), and MEO (Medium Earth Orbit) satellites, where the GEO and IGSO satellites are critical to ...
Junping Chen +4 more
doaj +2 more sources
The new lunar ephemeris INPOP17a and its application to fundamental physics [PDF]
MNRAS, 476 (2018) 1877-1888, 2017 We present here the new INPOP lunar ephemeris, INPOP17a. This ephemeris is obtained through the numerical integration of the equations of motion and of rotation of the Moon, fitted over 48 years of Lunar Laser Ranging (LLR) data. We also include the 2 years of infrared (IR) LLR data acquired at the Grasse station between 2015 and 2017.
Vishnu Viswanathan +5 more
arxiv +3 more sources
Departure from the constant-period ephemeris for the transiting exoplanet WASP-12 b [PDF]
, 2016 Most hot Jupiters are expected to spiral in towards their host stars due to transfering of the angular momentum of the orbital motion to the stellar spin. Their orbits can also precess due to planet-star interactions.
Bukowiecki, Ł. +13 more
core +4 more sources
Role of lunar laser ranging in realization of terrestrial, lunar, and ephemeris reference frames [PDF]
Journal of Geodesy, 2019 Three possible applications of lunar laser ranging to space geodesy are studied. First, the determination of daily Earth orientation parameters (UT0 and variation of latitude), which is rarely used nowadays in presence of all-year VLBI, SLR, and GNSS data. The second application is the determination of two (out of three) lunar orientation parameters, i.
D. Pavlov
arxiv +2 more sources