Explanations

Purpose

• Show time series of Zenith Path Delay (ZPD) parameters derived from the EPN combined solution

Procedure

• Combination of daily SINEX TRO files of the individual LACs solutions on a weekly basis
• Weak ZPD estimates of LACs solutions are excluded because of a standard deviation exceeding 15 mm
• Outliers of the input solutions are excluded before the combination
• Site-specific solutions of a single LAC eliminated for particular days if the standard deviation of the series exceeds 20 mm
• ZPD values of the combined solution exceeding a standard deviation of 20 mm were investigated for outliers