Results 81 to 90 of about 145 (102)

Second Epoch VLBA Calibrator Survey Observations - VCS-II. [PDF]

Astron J, 2016
Gordon D, Jacobs C, Beasley A, Peck A, Gaume R, Charlot P, Fey A, Ma C, Titov O, Boboltz D.   +9 more
europepmc   +1 more source

The NIST Automated Computer Time Service. [PDF]

J Res Natl Inst Stand Technol, 1989
Levine J, Weiss M, Davis DD, Allan DW, Sullivan DB.   +4 more
europepmc   +1 more source

Initial Results Obtained with the First TWIN VLBI Radio Telescope at the Geodetic Observatory Wettzell. [PDF]

Sensors (Basel), 2015
Schüler T, Kronschnabl G, Plötz C, Neidhardt A, Bertarini A, Bernhart S, la Porta L, Halsig S, Nothnagel A.   +8 more
europepmc   +1 more source

A Logical Model of Conceptual Integrity in Data Integration. [PDF]

J Res Natl Inst Stand Technol, 2003
Flater D.
europepmc   +1 more source

The Pioneer Anomaly. [PDF]

Living Rev Relativ, 2010
Turyshev SG, Toth VT.
europepmc   +1 more source

Secondary structures for splice junctions in eukaryotic and viral messenger RNA precursors. [PDF]

Nucleic Acids Res, 1980
Trapnell BC, Tolstoshev P, Crystal RG.
europepmc   +1 more source

Simulating the impact of new VLBI Intensive baselines on combined UT1-UTC solutions

Page, Jessica, Oldak Wong, Kate, Davis, Maria, Byram, Sharyl   +3 more
openaire   +2 more sources

Effect of station selection on VLBI-to-GNSS orientation transfer using space-ties onboard a next generation Galileo satellite

Sert H, Hugentobler U, Karatekin Ö, Dehant V.   +3 more
europepmc   +1 more source

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Modeling UT1-UTC and Polar Motion On-Board GPS Satellites

Navigation, Journal of the Institute of Navigation, 1984
Autonomous navigation of GPS satellites requires on-board knowledge of UT1-UTC and polar motion values. This study examines the ability of a fourth-order and fifth-order Fourier series to predict UT1-UTC values over six months based on one or three year BIH tables. Results show that UT1-UTC errors of approximately 40 ms occur over six months when three-
Raynor L Duncombe
exaly   +2 more sources

Short-term prediction of UT1-UTC by combination of the grey model and neural networks

Advances in Space Research, 2017
Abstract UT1-UTC predictions especially short-term predictions are essential in various fields linked to reference systems such as space navigation and precise orbit determinations of artificial Earth satellites. In this paper, an integrated model combining the grey model GM(1, 1) and neural networks (NN) are proposed for predicting UT1-UTC.
Dan-Dan Hu
exaly   +3 more sources