How to Deal With Station Dependent Errors - New Developments of the Absolute Field Calibration of PCV and Phase-Multipath With a Precise Robot 1

摘要

It has already been shown, that the absolute field calibration of GPS antenna phase center variations (PCV) with a precisely calibrated robot yields results with high accuracy and repeatability. Precise station independent absolute PCV are obtained. Many examples for different antenna types underline the high resolution in elevation and azimuth. It can be expected, that also IGS will switch to absolute PCV in a foreseeable period of time. The precision of the PCV enables a separation from the multipath (MP) errors. For active reference station networks, also providing real-time corrections, carrier phase multipath is an urgent field of research, since its periodic character also influences the correct instantaneous ambiguity resolution and the real time kinematic (RTK) positioning. Different scenarios from reduction to estimation are conceivable how to deal with this error term using a robot. The most recent developments of this approach and options for further research will be presented.