Ultra-rapid earth rotation determination with VLBI during CONT11 and CONT14 [PDF]
, 2016 We present earth rotation results from the ultra-rapid operations during the continuous VLBI campaigns CONT11 and CONT14. The baseline Onsala--Tsukuba, i.e., using two out of the 13 and 17 stations contributing to CONT11 and CONT14, respectively, was ...
Rüdiger Haas +3 more
core +1 more source
Broad band flux-density monitoring of radio sources with the Onsala twin telescopes [PDF]
, 2022 The Onsala twin telescopes (OTT) are two 13 m telescopes located at the Onsala Space Observatory in Sweden. With dual linear polarized broad-band (3-14 GHz) receivers, they are part of the next generation Very Long Baseline Interferometry (VLBI) Global ...
Haas, R\ufcdiger +3 more
core +2 more sources
Combining VGOS, legacy S/X and GNSS for the determination of UT1 [PDF]
, 2022 We perform a combination on the observation level (COL) between VLBI and co-located GNSS in the context of VLBI intensive sessions. Our approach revolves around an estimation procedure which uses 3 h of GNSS data that uniformly encapsulate the 1-h VLBI ...
Diamantidis, Periklis +4 more
core +2 more sources
Experience from geodetic very long baseline interferometry observations at Onsala using a digital backend [PDF]
, 2015 The Onsala Space Observatory has installed a modern digital backend for geodetic and astronomical Very Long Baseline Interferometry (VLBI). This system consists of a Digital Base-Band Converter (DBBC) and a Mark 5B+ recorder.
Haas, Rüdiger, Kareinen, Niko
core +1 more source
Water vapour radiometry in geodetic very long baseline interferometry telescopes: assessed through simulations [PDF]
, 2021 The accuracy of geodetic Very Long Baseline Interferometry (VLBI) is affected by water vapour in the atmosphere in terms of variations in the signal propagation delay at the different stations.
Elgered, Gunnar +2 more
core +1 more source
The EUropean-VGOS Project [PDF]
, 2019 In Spring 2018 the Bonn correlation centre\ua0started a collaboration with the three European stations\ua0of Wettzell, Onsala and Yebes, equipped with\ua0both S/X- and broadband systems, to perform VGOS-like test sessions.
Alef, Walter +15 more
core +7 more sources
A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept [PDF]
, 2021 open25openSekido, Mamoru; Takefuji, Kazuhiro; Ujihara, Hideki; Kondo, Tetsuro; Tsutsumi, Masanori; Kawai, Eiji; Hachisu, Hidekazu; Nemitz, Nils; Pizzocaro, Marco; Clivati, Cecilia; Perini, Federico; Negusini, Monia; Maccaferri, Giuseppe; Ricci, Roberto ...
core +1 more source
Geophysical Research Letters, Volume 46, Issue 21, Page 11841-11849, 16 November 2019., 2019 Abstract The expansion of globally consistent satellite‐radar imagery presents new opportunities to measure Earth‐surface displacements on intercontinental scales. Yet global applications, including a complete assessment of the land contribution to relative sea‐level rise, first demand new solutions to unify relative satellite‐radar observations in a ...
A. L. Parker +4 more
wiley +1 more source
A Fast Radio Burst Search Method for VLBI Observation
, 2018 We introduce the cross spectrum based FRB (Fast Radio Burst) search method for VLBI observation. This method optimizes the fringe fitting scheme in geodetic VLBI data post processing, which fully utilizes the cross spectrum fringe phase information and ...
Liu, Lei +4 more
core +1 more source
Terrestrial monitoring of a radio telescope reference point using comprehensive uncertainty budgeting [PDF]
, 2016 During the 15-day-long global very long baseline interferometry campaign CONT14, a terrestrial monitoring campaign was carried out at the Onsala Space Observatory.
Cornelia Eschelbach +2 more
core +1 more source