Experience from geodetic very long baseline interferometry observations at Onsala using a digital backend
Journal article, 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. From 2011 until late 2014 this new system was run for geodetic VLBI observations in paral- lel with the old system consisting of a Mark 4 rack and Mark 5A recording system. Several of these observed ses- sions were correlated at the correlator in Bonn including both data sets. We present results from the analysis and comparison of these sessions. Both the original observed delays and corresponding geodetic parameters are com- pared. No significant differences are detected, for either the raw observations or for the geodetic parameters. This shows that the digital backend can be used operationally for geodetic VLBI observations.


digital base-band converter

Mark 4

geodetic very long baseline interferometry

VLBI2010 Global Observing System


Niko Petteri Kareinen

Chalmers, Earth and Space Sciences, Space Geodesy and Geodynamics

Rüdiger Haas

Chalmers, Earth and Space Sciences, Space Geodesy and Geodynamics

Journal of Geodetic Science

2081-9943 (eISSN)

Vol. 5 1 26-34

Subject Categories

Other Earth and Related Environmental Sciences


Onsala Space Observatory



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