# Monitoring of Possible Activities of Yangsan Fault Zone Using GNSS
## 2 Materials
### Data Processing Software
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Station** & **Receiver** & **Antenna** & **Latitude** & **Longitude** & **Height** & **Organization** \\ \hline AJAC & LEICA GR50 & TRM115000.00 & 41.927 & 8.763 & 99 & IGS \\ BJFS & TRIMBLE NETB9 & TRM59900.00 & 39.609 & 115.892 & 87 & IGS \\ BRST & TRIMBLE ALLOY & TRM57971.00 & 48.380 & \(-\)4.497 & 66 & IGS \\ CHAN & ASHTECH UZ-12 & ASH701945C\_M & 43.791 & 125.443 & 268 & IGS \\ CHUM & TRIMBLE NETRS & AOAD/M\_T & 42.999 & 74.751 & 716 & IGS \\ CRO1 & SEPT POLARX5 TR & JAVRINGANT\_DM & 17.757 & \(-\)64.584 & \(-\)31 & IGS \\ DARW & SEPT POLARX5 & JAVRINGANT\_DM & \(-\)12.844 & 131.133 & 125 & IGS \\ DRAG & JAVAD TRE\_3 & ASH700936D\_M & 31.593 & 35.392 & 32 & IGS \\ DELTA & & & & & \\ FALK & SEPT POLARX5 & ASH701945E\_M & \(-\)51.694 & \(-\)57.874 & 51 & IGS \\ FLIN & SEPT POLARX5 & NOV750.R4 & 54.726 & \(-\)101.978 & 320 & IGS \\ HERT & LEICA & LEIAT504 GG & 50.867 & 0.334 & 83 & IGS \\ GRX1200 GGPRO & & & & & \\ \multicolumn{5}{c}{LEICA} & & & \\ HYDE & GRX1200 GGPRO & LEIAT504 GG & 17.417 & 78.551 & 442 & IGS \\ INVK & TRIMBLE NETB9 & ASH701945C\_M & 68.306 & \(-\)133.527 & 46 & IGS \\ KRGG & TRIMBLE ALLOY & LEIAR25.R4 & \(-\)49.352 & 70.256 & 73 & IGS \\ LHAZ & LEICA GR25 & LEIAR25.R4 & 29.657 & 91.104 & 3622 & IGS \\ LROC & LEICA GR25 & ASH701945B\_M & 46.159 & \(-\)1.219 & 58 & IGS \\ MAS1 & SEPT POLARX5 & LEIAR25.R4 & 27.764 & \(-\)15.633 & 197 & IGS \\ MATE & SEPT POLARX5 & TRIM59800.00 & 40.649 & 16.704 & 536 & IGS \\ NKLG & Trimble Alloy & TRM59800.00 & 0.354 & 9.672 & 32 & IGS \\ STJO & JAVAD TRE\_3N & AOAD/M\_T & 47.595 & \(-\)52.678 & 153 & IGS \\ TDSE & TRIMBLE ALLOY & TRM59800.00 & 43.561 & 1.481 & 207 & IGS \\ TOW2 & SEPT POLARX5 & LEIAR25.R3 & \(-\)19.269 & 147.056 & 88 & IGS \\ UNBJ & TPS LEGACY & TRM57971.00 & 45.950 & \(-\)66.642 & 23 & IGS \\ WES2 & TRIMBLE ALLOY & TWIVC6150 & 42.613 & \(-\)71.493 & 85 & IGS \\ ZIMM & TRIMBLE NETB9 & TRM29659.00 & 46.877 & 7.465 & 956 & IGS \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The list of IGS stations. Figure 2: The 24 domestic stations used in the paper. The area around the Yangsan Fault; 7 are operated by KIGAM and 15 are operated by NGII. The resulting coordinates with millimeter level accuracy are essential to analyze the crustal movement using GNSS. For this end, various correction models should be used to minimize difference sources of errors in the observation data. Table 3 summarizes the important options used for the Bernese data processing. The raw measurements were obtained from one of the IGS analysis centers, the Center for Orbit Determination in Europe (CODE), and the Crustal Dynamics Data Information System (CDDIS). IGS products were used for the satellite's orbital force and clock information, and the movement of the Earth's rotation axis. The most accurate final orbit in SP3 format was used for better solution. The crust fluctuation is influenced by ocean loading, which should be accounted for to minimize the positioning errors. The FES2004 model, recommended by IGS, was used in this study.