Phase correction of VLBI with water vapour radiometry
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
We demonstrate phase correction of 3 mm VLBI observations using the scanning 18 GHz to 26 GHz water vapour radiometer at Effelsberg and we demonstrate an absolute accuracy of 15 mm in zenith path delay by comparing with GPS and radiosondes. This accuracy should provide significant improvement in astrometric phase referencing observations. It is not good enough for geodetic VLBI to replace the tropospheric delay estimation but could be used to remove short-term path-length fluctuations and so improve the geodetic observables. We discuss lessons learned and opportunities for further improvement.
6 pages, 3 figures, to appear in the proceedings of the 8th EVN symposium held in Torun, Poland, September 2006
6 pages, 3 figures, to appear in the proceedings of the 8th EVN symposium held in Torun, Poland, September 2006