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121.425  Articles
1 of 12.143 pages  |  10  records  |  more records»
Very-long-baseline interferometry (VLBI) is used for establishing global geodetic networks where the coordinates attain a 1-mm level of precision. Technique-dependent bias can degrade the VLBI positioning accuracy if it is present and unaccounted for. Amo... see more

This paper reviews observational evidence obtained to date about the overall structure of the magnetic ?elds in the jets of Active Galactic Nuclei (AGN). Because they are sensitive to the line-of-sight magnetic-?eld component, Faraday rotation observation... see more

Objective: To study the survival to discharge and immediate outcome of preterm very low birth weight (VLBW) infants. Materials and Methods: Design: Prospective observational longitudinal study. Setting: Level II neonatal intensive care unit in a tertiary ... see more

Several studies prove that ocean tide loading (OTL) displacements can be observed with space geodetic techniques. In this study, the amplitudes and Greenwich phase lags for each coordinate component, i.e., radial, west, and south of the principal lunar se... see more

Geodesy is the science of measuring and mapping the geometry, orientation and gravity field of the Earth including the associated variations with time. Geodesy has also provided the foundation for high accuracy surveying and mapping. Modern Geodesy involv... see more

The free electrons in the ionosphere have a strong impact on the propagation of radio waves. When the signals pass through the ionosphere, both their group and phase velocity are disturbed. Several space geodetic techniques such as satellite altimetry, lo... see more

The Earth expansion problem has attracted great interest, and the present study demonstrates that the Earth has been expanding, at least over the recent several decades. Space-geodetic data recorded at stations distributed globally were used (including gl... see more

We used 15 GHz multi-epoch Very Long Baseline Array (VLBA) polarization sensitive observations of 484 sources within a time interval 1996–2016 from the MOJAVE program, and also from the NRAO data archive. We have analyzed the linear polarization character... see more

We present the first results of an ongoing intra-day variability (IDV) flux density monitoring program of 107 blazars, which were selected from a sample of RadioAstron space very long baseline interferometry (VLBI) targets. The IDV observations were perfo... see more

1 of 12.143 pages  |  10  records  |  more records»