Results 71 to 80 of about 12,904 (207)
Impact of the precise ephemeris on accuracy of GNSS baseline in relative positioning technique
Vietnam Journal of Earth Sciences, 2020 For advanced geodesy tasks that require high-accuracy, such as tectonics, surveying services usually use not only long-baselines but also the duration of tracking GNSS satellites in a long (e.g., 24/7).
D. T. Tran +3 more
semanticscholar +1 more source
Impacts of the May 2024 Extreme Geomagnetic Storm on Global High‐Accuracy GPS Positioning Solutions
Space Weather, Volume 23, Issue 10, October 2025.Abstract The May 2024 geomagnetic storm has been recognized as the most severe one in the past two decades and was categorized as an “extreme” (G5) event according to the NOAA space weather scales. This study applies Precise Point Positioning (PPP) software PRIDE PPP‐AR to over 5,800 worldwide GNSS receiver data to highlight the vulnerability of high ...
Zhe Yang, Y. T. Jade Morton
wiley +1 more source
The new lunar ephemeris INPOP17a and its application to fundamental physics [PDF]
, 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 yr of lunar laser ranging (LLR) data. We also include the 2 yr of
Vishnu Viswanathan +5 more
semanticscholar +1 more source
SoftwareXLEO (Low Earth Orbit)-based PNT (Positioning, Navigation and Timing) has become a research topic of much interest and a focus of development. As LEO satellites for PNT are expected to independently provide space-time references in the future, similar to ...
Zhao Xi, Yu Baoguo, Luo Bin
doaj +1 more source
Near-Real-Time Global Thermospheric Density Variations Unveiled by Starlink Ephemeris
Remote SensingPrevious efforts to retrieve thermospheric density using satellite payloads have been limited to a small number of satellites equipped with GNSS (Global Navigation Satellite System) receivers and accelerometers.
Zhuoliang Ou +10 more
doaj +1 more source
Improving the Accuracy of the Martian Ephemeris Short-Term Prediction
Advances in Astronomy, 2018 The Chinese Mars exploration mission is planned to be launched in 2020, which includes an orbiter, a lander, and a rover. High precision Martian ephemeris is very important in Mars exploration, especially for the Martian orbit insertion and the Martian ...
Quan Shan +5 more
doaj +1 more source
ALMA SOLAR EPHEMERIS GENERATOR
Rudarsko-geološko-naftni Zbornik, 2019 An online software tool for the easy preparation of ephemerides of the solar surface features is presented. It was developed as a helper tool for the preparation of observations of the Sun with the Atacama Large Millimeter/submillimeter Array (ALMA), but
Ivica Skokić, Roman Brajša
doaj +1 more source
EPHEMERIS OF JUPITER'S NINTH SATELLITE [PDF]
, 1926 Seth B. Nicholson, Hazel Marie Losh
openalex +1 more source
Precise Orbit Determination of GPS Satellites for Real Time Applications [PDF]
Journal of Astronomy and Space Sciences, 2001 The accuracy of GPS applications is heavily dependent on the satellite ephemeris and earth orientation parameter. Specially applications like as the real time monitoring of troposphere and ionosphere require real time or predicted ephemeris and earth ...
Hyung-Chul Lim +4 more
doaj