Observation Duration and Multipath Analysis on Yogyakarta Opak Fault Monitoring Stations

摘要

GNSS observation of Opak Fault are performed on the monitoring network from 2013 to 2016 to find out the deformation magnitude. The condition around the monitoring Bench Marks (BMs) change with the time. The growing vegetation makes the GNSS observation data has a different obstruction and multipath values. Besides, the observation performed each year has a different observation duration. In this study, the difference in observation duration and multipath value in each year is modeled by linear and polynomial regressions. The modeling is carried out to determine the relationship between these values to the coordinate precision. The observation duration and multipath values are grouped into several classes to simplify the modeling. Based on the result, it is shown that the observation duration has the higher effect on the coordinate precision than multipath value.