Results 51 to 60 of about 153 (130)

Optimal distribution of VLBI transmitters in the Galileo space segment for frame ties. [PDF]

Earth Planets Space, 2023
Wolf H, Böhm J.
europepmc   +1 more source

Rethinking operational VGOS observations

The VLBI Global Observing System (VGOS) was created to meet the ambitious requirements set by the Global Geodetic Observing System (GGOS). Its primary objective is achieving millimeter-level precision while maintaining continuous 24/7 observations. Currently, both aims remain unfulfilled.
Matthias Schartner, Bill Petrachenko, Patrick Charlot, Minghui Xu, Arnaud Collioud, Hana Krasna, Soja Benedikt   +6 more
openaire   +2 more sources

The Australian mixed-mode observing program. [PDF]

J Geod, 2022
McCallum L, Chin Chuan L, Krásná H, McCallum J, Böhm J, McCarthy T, Gruber J, Schartner M, Quick J, Rogers A.   +9 more
europepmc   +1 more source

A Comparative Survey of Adaptive Codec Solutions for VoIP over Multirate WLANs: A Capacity versus Quality Performance Trade-Off

EURASIP Journal on Wireless Communications and Networking, 2011
In multi-rate WLANs, users can suffer transmission rate changes due to the link adaptation mechanism. This results in a variable capacity channel, which is very hostile for VoIP and can cause serious quality of service (QoS) degradation in all active ...
Sfairopoulou A, Bellalta B, Macian C, Oliver M   +3 more
doaj  

Probing a southern hemisphere VLBI Intensive baseline configuration for UT1 determination. [PDF]

Earth Planets Space, 2022
Böhm S, Böhm J, Gruber J, Kern L, McCallum J, McCallum L, McCarthy T, Quick J, Schartner M.   +8 more
europepmc   +1 more source

VLBI measurement of the vector baseline between geodetic antennas at Kokee Park Geophysical Observatory, Hawaii. [PDF]

J Geod, 2021
Niell AE, Barrett JP, Cappallo RJ, Corey BE, Elosegui P, Mondal D, Rajagopalan G, Ruszczyk CA, Titus MA.   +8 more
europepmc   +1 more source

Review of Operational VGOS Sessions in 2020

, 2021
25th European VLBI Group for Geodesy and Astronomy Working Meeting, 14-18 March ...
Gipson, John M., Bolotin, Sergei, Baver, K., Behrend, Dirk, Lemoine, F.G., Elosegui, Pedro, Ruszczyk, Chester A.   +6 more
openaire   +1 more source

Short-baseline interferometry local-tie experiments at the Onsala Space Observatory. [PDF]

J Geod, 2021
Varenius E, Haas R, Nilsson T.
europepmc   +1 more source

Optimal VLBI baseline geometry for UT1-UTC Intensive observations. [PDF]

J Geod, 2021
Schartner M, Kern L, Nothnagel A, Böhm J, Soja B.   +4 more
europepmc   +1 more source

An Experiment to Observe GNSS Signals with the Australian VGOS Array

Publications of the Astronomical Society of the Pacific
Abstract This paper introduces a new instrument enabling a novel combination of Earth measuring techniques: direct observations with the radio astronomical instruments to satellites of the global navigation satellite systems (GNSS). Inter-technique biases are a major error source in the terrestrial reference frame.
Lucia McCallum, David Schunck, Jamie McCallum, Tiege McCarthy   +3 more
openaire   +2 more sources