Results 71 to 80 of about 779 (166)
Variability Type Determination and High Precision Ephemeris for NSVS 7606408
, 2014 A photometric campaign analysis of the star NSVS 7606408 has been conducted in order to determine the type of variability and high accuracy ephemeris. By combining the obtained data with other datasets available, it was tried to improve the determination of the period, highlighting, however, a possible minimal change of the period over the years.
openaire +2 more sources
Remote SensingThe high-precision satellite velocities and accelerations calculated by the Global Navigation Satellite System (GNSS) are essential for tasks such as airborne gravity data processing.
Chuanfeng Song +4 more
doaj +1 more source
Accurate and Rapid Broadcast Ephemerides for Beidou-Maneuvered Satellites
Remote Sensing, 2019 The geostationary earth orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites of the Beidou navigation satellite system are maneuvered frequently. The broadcast ephemeris can be interrupted for several hours after the maneuver.
Jing Qiao +3 more
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Optical Photometry of LMXBs: UW CrB (=MS 1603+260) and V1408 Aql (=4U 1957+115)
Acta Polytechnica CTU Proceedings, 2015 We present new optical observations of V1408 Aql (= 4U 1957+115), the only low mass X-ray binary, black hole candidate known to be in a persistently soft state.
P. A. Mason +3 more
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Beginnings of Satellite Navigation
Kartografija i Geoinformacije, 2008 The first satellite navigation system called the Navy Navigation Satellite System (NNSS) or TRANSIT was planned in the USA in 1958. It consisted of 5-6 artificial Earth satellites, was set in motion for the USA military in 1964, and in 1967 for civilian ...
Miljenko Solarić
doaj
Study on the Design of Broadcast Ephemeris Parameters for Low Earth Orbit Satellites
Remote SensingThe integration of low Earth orbit (LEO) satellite constellations into the Global Navigation Satellite System (GNSS) has emerged as a prominent research focus, as LEO satellites can significantly enhance the precision of GNSS positioning, navigation, and
Dongzhu Liu +4 more
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Image Positioning Accuracy Analysis for Super Low Altitude Remote Sensing Satellites
International Journal of Advanced Robotic Systems, 2012 Super low altitude remote sensing satellites maintain lower flight altitudes by means of ion propulsion in order to improve image resolution and positioning accuracy.
Ming Xu, Nan Zhou
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Utilization CSRS-PPP software for recovery aircraft’s position [PDF]
Scientific Journal of Silesian University of Technology. Series Transport, 2015 The PPP method is applied in aeronautical navigation as a new technique for determination of aircraft’s position. In this paper preliminary results of recovery aircraft’s position were presented.
Kamil KRASUSKI
doaj
IOP Conference Series: Earth and Environmental ScienceThe accuracy of GNSS positioning is largely determined by the type of ephemeris data applied. These include broadcast ephemeris, which is accessible in real time, and precise ephemeris, which is released after post-processing by institutions like the International GNSS Service (IGS).
Septya Zahrina Azatil Ismah +1 more
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Realtime Precise Orbit Determination Technology for LEO Mega-Constellation
天地一体化信息网络Supported by GNSS, it analyzed the advantages and disadvantages of solving LEO satellite orbit on the ground or onboard the satellites.The high-fidelity non-conservative force models were applied to the real-time orbit determination algorithm.To separate
Zhen LI, Chuang SHI
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