NEWS
First IVS VGOS session successfully correlated at TU Wien
For the first time, a 24h VGOS session of the International VLBI Service for Geodesy and Astrometry (IVS) was correlated at TU Wien. Eight globally distributed radio telescopes participated in session VO1021 on January 21, 2021, each observing quasars with a data rate of 8 Gbit/s. In total, more than 220 TByte had to be e-transferred to Vienna before being processed on the Vienna Scientific Cluster 4. The session fit of the finally used 11 thousand observations was 20 picoseconds.
New software to simulate raw telescope data for VLBI
Jakob Gruber has developed software to simulate raw telescope data for VLBI (VieRDS). Interested? The software is available via Github and the description with the mathematical background has just gone online as open access paper. @IVS_OOC
Paper on ICRF3 published in A&A
What a nice Christmas present: the paper on the ICRF3 is finally published in A&A: https://doi.org/10.1051/0004-6361/202038368 . Wien is very happy and honored to have been part of this great achievement! @IVS_OOC @tu_wien
IVS Newsletter online
Do not miss the December 2020 issue of the IVS Newsletter! @IVS_OOC It features the Celestial Reference Frame with great interviews by “CRF veterans”. It also introduces the joint Operation Center by Wettzell, Zürich, and Wien. https://ivscc.gsfc.nasa.gov/publications/newsletter/issue58.pdf
Saying goodbye to Matthias
Matthias will leave TU Wien with the end of September 2020, starting at ETH Zürich (Space Geodesy group of Benedikt Soja) on October 1. Matthias, it was a pleasure having you at TU Wien, we wish Laura and you all the best for the future, and we are looking forward to a close co-operation between our groups.
Welcome Frederic at TU Wien
We are very glad to have a new member in the Vienna VLBI group: Frederic Jaron. He is an experienced VLBI-ler with a background in astrophysics and interest in a wide variety of VLBI topics. Among other topics, he will look into source structure effects in VGOS observations.
VieVS Days 2020 held as Webinar
This year’s edition of the VieVS Days was held online as webinar from September 14 to 15. While the first day was devoted to the VLBI module of the Vienna VLBI and Satellite Software (VieVS) with lectures by Helene on single session analysis and Sigrid on global solutions, Matthias focused on the scheduling package VieSched++ on the second day. More information is available here: https://vievswiki.geo.tuwien.ac.at/
Benedikt Soja from ETH Zürich visiting TU Wien
While visiting his family in Vienna, Benedikt Soja stopped by for a chat at TU Wien. He also took the chance and talked to Matthias Schartner who will start in Benedikt’s group on space geodesy at ETH Zürich on October 1, 2020. Definitely, a close co-operation between our groups is guaranteed.
Paper on optimal VGOS station positions published
Do you want to know where new VGOS stations would best improve earth orientation parameters? Schartner et al. provide the answer in an article in Earth, Planets and Space.
VieVS YouTube tutorials online
Finally, we found some time to record new videos for our VieVS YouTube channel.
In these videos, all aspects of the VieVS VLBI module are discussed and examples are shown.
This covers all major features of the VieVS VLBI software, including:
- session analysis (fixing clock breaks, removing stations, eliminating outliers…)
- 24-hour sessions
- intensive sessions
- investigating the results
- calculate and show baseline length repeatability
- display and output estimated parameters
- output SINEX files
- output EOP files
- access MatLab structures…
- efficient VieVS processing
- parameter files
- process lists
- accelerate processing
- calculate global solution
- simulations
- and more
Therefore, our VieVS VLBI videos are a good starting point if you want to learn how to use VieVS or if you want to learn VLBI analysis in general.
Link to the VieVS VLBI playlist