Results 61 to 70 of about 20,578 (146)
GINS: a new tool for VLBI Geodesy and Astrometry
, 2007 In the framework of the "Groupe de Recherches de G\'eod\'esie Spatiale" (GRGS), a rigorous combination of the data from five space geodetic techniques (VLBI, GPS, SLR, LLR and DORIS) is routinely applied to simultaneously determine a Terrestrial ...
Biancale, R., Bourda, G., Charlot, P.
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Remote SensingWith the application and promotion of space geodesy, the popularization of remote sensing technology, and the development of artificial intelligence, a more accurate and stable Terrestrial Reference Frame (TRF) has become more urgent.
Qiuxia Li, Xiaoya Wang, Yabo Li
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VLBI analyses with the GINS software for multi-technique combination at the observation level
, 2007 A rigorous approach to simultaneously determine a Terrestrial Reference Frame (TRF) and Earth Orientation Parameters (EOP) is now currently applied on a routine basis in a coordinated project within the Groupe de Recherches de G\'eod\'esie Spatiale (GRGS)
Biancale, R., Bourda, G., Charlot, P.
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A demonstration of high precision GPS orbit determination for geodetic applications [PDF]
High precision orbit determination of Global Positioning System (GPS) satellites is a key requirement for GPS-based precise geodetic measurements and precise low-earth orbiter tracking, currently under study at JPL.
Border, J. S., Lichten, S. M.
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A Java Program Generating Barycentric Observer Velocities from JPL Ephemerides
, 2022 This works presents a program which computes velocities of an Earth-bound observatory in the reference frame of the barycenter of the solar system. It feeds from ephemerides files of the Jet Propulsion Laboratory to extract the velocity of the geocenter,
Mathar, Richard J.
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Performance of Loran-C chains relative to UTC [PDF]
The long term performance of the eight Loran-C chains in terms of the Coordinated Universal Time (UTC) of the U.S. Naval Observatory (USNO) and the use of the Loran-C navigation system to maintain the user's clock to a UTC scale, are examined. The atomic
Chi, A. R.
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Position determination of a lander and rover at Mars with Earth-based differential tracking [PDF]
The presence of two or more landed or orbiting spacecraft at a planet provides the opportunity to perform extremely accurate Earth-based navigation by simultaneously acquiring Doppler data and either Same-Beam Interferometry (SBI) or ranging data ...
Edwards, C. D. +3 more
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, 2010 We present theory and algorithms to perform an all-sky coherent search for periodic signals of gravitational waves in narrow-band data of a detector.
Andrzej Królak +12 more
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The IAA RAS Correlator First Results [PDF]
In 2009 the national Russian VLBI observations were processed by the new correlator ARC (Astrometric Radiointerferometric Correlator). The ARC is a VSI-H correlator and equipped with Mark 5B playback terminals.
Melnikov, Alexey +3 more
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Observation model and parameter partials for the JPL geodetic (GPS) modeling software 'GPSOMC' [PDF]
The physical models employed in GPSOMC, the modeling module of the GIPSY software system developed at JPL for analysis of geodetic Global Positioning Satellite (GPS) measurements are described.
Sovers, O. J.
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