Correction of apparent position shifts caused by GNSS antenna changes |
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| Authors: | Lambert Wanninger |
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| Institution: | (1) Geodetic Institute, Dresden University of Technology, 01062 Dresden, Germany |
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| Abstract: | Antenna changes at GNSS reference stations frequently produce discontinuities in the coordinate time series. These apparent
position shifts are mainly caused by changes of carrier-phase multipath effects and different errors in the antenna phase
center corrections. A monitoring method was developed and successfully tested, which requires additional GNSS observations
from a local, temporary reference station. Changes of carrier-phase measurement errors due to the antenna change are determined
and stored in L1 and L2 phase maps. These phase maps provide corrections to be applied either to the observation data obtained
before the antenna change or to the observation data obtained after the antenna change. The observation corrections are able
to remove coordinate discontinuities independent of the selected coordinate estimation algorithm.
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| Keywords: | GNSS Reference stations Antenna change Multipath Phase center |
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