Results 1 to 10 of about 725 (134)

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   +3 more sources

A Method for Enhancing the Positioning Performance of PPP-B2b by Integrating Galileo Observation [PDF]

Sensors
The BeiDou-3 (BDS-3) Precise Point Positioning service (PPP-B2b) can realize decimeter-level positioning by broadcasting satellite orbit, clock offset, and code bias corrections via GEO satellites, enabling PPP without reliance on ground communication ...
Xuena Shang, Liwenle Liu, Yilong Yuan, Mengxiang Tong, Qianqian He, Xiaopeng Gong   +5 more
doaj   +2 more sources

A new interpolation method based on satellite physical character in using IGS precise ephemeris

Geodesy and Geodynamics, 2014
Due to the deficiency of sliding Lagrange polynomial interpolation, the author proposes a new interpolation method, which considers the physical character of satellite movement in coordinate transformation and reasonable selection of interpolation ...
Liu Weiping, Hao Jinming
doaj   +3 more sources

A Three-Step Method for Determining Unhealthy Time Period of GPS Satellite Orbit in Broadcast Ephemeris and Its Preliminary Applications for Precise Orbit Determination

Remote Sensing, 2019
Abnormal information of satellite orbits inevitably appears in the broadcast ephemeris. Failure to obtain unhealthy information on GPS satellite orbits in precise orbit determination (POD) degrades GPS service performance.
Fei Ye, Yunbin Yuan, Baocheng Zhang, Bingfeng Tan, Jikun Ou   +4 more
doaj   +3 more sources

Implementation and performance analysis of real time PPP software based on GAMP

Dianzi Jishu Yingyong, 2022
Aiming at the problem that GAMP software lacks the function of real-time precise point positioning at this stage, this paper analyzes and studies the principle and process of the post precise point positioning algorithm in the software, compares the ...
Liu Ya, He Wentao, Zhang Jie
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

TESS Timings of 31 Hot Jupiters with Ephemeris Uncertainties

The Astrophysical Journal Supplement Series, 2023
A precise transit ephemeris serves as the premise for follow-up exoplanet observations. We compare TESS Object of Interest (TOI) transit timings of 262 hot Jupiters with the archival ephemeris and find 31 of them having TOI timing offsets, among which ...
Su-Su Shan, Fan Yang, You-Jun Lu, Xing Wei, Wen-Wu Tian, Hai-Yan Zhang, Rui Guo, Xiao-Hong Cui, Ai-Yuan Yang, Bo Zhang, Ji-Feng Liu   +10 more
doaj   +1 more source

Evaluation of BDS-2 and BDS-3 Satellite Atomic Clock Products and Their Effects on Positioning

Remote Sensing, 2021
The BeiDou Navigation Satellite System (BDS) has completed third phase construction and currently provides global services, with a mixed constellation of BDS-2 and BDS-3. The newly launched BDS-3 satellites are equipped with rubidium and passive hydrogen
Shengfeng Gu, Feiyu Mao, Xiaopeng Gong, Yidong Lou, Xueyong Xu, Ye Zhou   +5 more
doaj   +1 more source

Orbit Prediction using Broadcast Ephemeris for GLONASS Satellite Visibility Analysis [PDF]

Journal of Astronomy and Space Sciences, 2009
Even though there are several Global Navigation Satellite Systems under development, only GPS and GLONASS are currently available for satellite positioning.
Hye-In Kim, Kwan-Dong Park
doaj   +1 more source

Real-Time LEO Satellite Orbits Based on Batch Least-Squares Orbit Determination with Short-Term Orbit Prediction

Remote Sensing, 2022
The augmentation of the Global Navigation Satellite System (GNSS) by Low Earth Orbit (LEO) satellites is proposed as an effective method to improve the precision and shorten the convergence time of Precise Point Positioning (PPP).
Kan Wang, Jiawei Liu, Hang Su, Ahmed El-Mowafy, Xuhai Yang   +4 more
doaj   +1 more source