13-19 March 2016
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=12&confId=56">Proceedings, </a> <a href="http://events.saip.org.za/materialDisplay.py?materialId=4&confId=56"> Programme and Book of Abstracts</a> and <a href="http://events.saip.org.za/getFile.py/access?resId=1&materialId=4&confId=56">Errata</a>

Constraining Least Squares VLBI Solutions

16 Mar 2016, 11:10
15m
Oral Presentation 4: Data Structures and Analysis Strategies in the VGOS Era Oral4: Data structures and Analysis Strategies in the VGOS Era

Speaker

Dr Thomas Artz (Institute of Geodesy and Geoinformation, University of Bonn)

Description

In a traditional least squares adjustment of parameters to the VLBI observation, typically tropospheric as well as clock parameters are determined in form of continuous piece-wise linear functions (CPWLF) with a given temporal resolution. As the VLBI observations are not equidistant, and on the contrary, exhibit gaps of sometimes several hours, singularities arise due to unresolvable parameters inside these gaps. This issue as well as the geometric datum deficiency require additional information to determine the VLBI target parameters, e.g, Earth orientation parameters, as well as the celestial and terrestrial reference frames. For this reason, it is necessary to constrain the respective parameters in the solution. In this paper we analyze the singularities which arise within the geodetic VLBI data analysis and show the ramifications of traditional constraining. Furthermore, we give suggestions to optimize the least squares solution with regard to constraining the VLBI solution. The effects of various approaches are validated by the analysis of continuous VLBI campaigns.

Primary author

Dr Thomas Artz (Institute of Geodesy and Geoinformation, University of Bonn)

Co-authors

Mr Andreas Iddink (Institute of Geodesy and Geoinformation, University of Bonn) Axel Nothnagel (Institute of Geodesy and Geoinformation, University of Bonn) Mrs Corinna Tegtmeier (Institute of Geodesy and Geoinformation, University of Bonn) Mr Sebastian Halsig (Institute of Geodesy and Geoinformation, University of Bonn)

Presentation Materials

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