engleski

GNSS Antenna Absolute Field Calibration System – Development and Initial Testing

For high-precision Global Navigation Satellite Systems (GNSS) positioning based on carrier-phase observations, knowledge of the GNSS receiver antenna electrical phase center is crucial. Numerous studies have led to the understanding of the influence of GNSS antenna phase center on GNSS positioning accuracy. With the goal of determining the phase center correction model of GNSS antennas, several GNSS antenna calibration systems are in operation or under development worldwide. The International GNSS Service (IGS) publishes type-mean phase center correction models for almost all geodetic-grade GNSS antennas. However, the type-mean models are not perfect and do not fully reflect the reception characteristics of GNSS antennas. Published scientific research results have shown that depending on the application of individual or type-mean phase center correction models, the results may differ significantly, i.e., the application of individual phase center correction models significantly improves the accuracy of GNSS positioning. The objective of this PhD research is to develop an automated absolute GNSS antenna field calibration system based on a 6-axis industrial robot.

GNSS ; receiver antennas ; phase center corrections ; industrial robot ; absolute antenna calibration

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