INTERGEO Agenda - english

High-precision GNSS-based positioning relies on accurate antenna Phase Center Corrections (PCC). However, the lack of universally accepted ground truth for antenna calibration values leads to discrepancies between results from different calibration facilities and methods. These differences (dPCC) are typically analyzed in the PCC domain as defined by the Antenna Exchange (ANTEX) format. Yet, agreement at the PCC grid level does not directly reflect the impact on estimated geodetic parameters. We present PCC-Suite, an open-source Python toolkit with user-friendly graphical interfaces for exploring, converting, visualizing and analyzing PCC or dPCC. ATX-Scanner enables search and filtering of ANTEX files by antenna type, frequency, calibration method, and other metadata. PCC-Viewer visualizes PCC or dPCC for selected frequencies and ionosphere-free linear combinations (IF-LC), using stereographic projections and azimuth-averaged profiles. ATX-Converter provides bidirectional conversion between ANTEX versions 1.4 and 2.0. The core component, PCC-Explorer, quantifies the impact of PCC or dPCC on geodetic parameters, i.e., topocentric coordinate differences, receiver clock estimates and tropospheric parameters, under realistic multi-GNSS conditions. The software processes ANTEX data (v1.4 or v2.0), supports major GNSS constellations and frequencies, and allows user-defined IF-LC. Configurable parameters include station location and time span, azimuth/elevation masks, observation weighting, tropospheric mapping functions, sampling rate, and solution length (e.g., 3 h or 24 h). It further enables regional to global impact assessments on user-defined grids. The analysis is focused on geodetic parameters of operational significance for GNSS users and network providers. Exemplary simulations are interpreted and validated against Precise Point Positioning (PPP) solutions derived from real GNSS observations from the IGS antenna calibration campaign. In addition, a kinematic mode is presented, allowing users to import a trajectory to assess the impact of dPCC on geodetic parameters along a moving path. Overall, PCC-Suite enables GNSS users and network operators to make informed assessments of calibration quality and thus supports standardized, reproducible, and reliable evaluation of the influence of calibration results on geodetic parameters.