# Monitoring of Possible Activities of Yangsan Fault Zone Using GNSS
## 2 Materials
### Data Processing Software  
Precision baseline analysis is made up of a various combination of factors, such as satellite orbits, tropospheric and ionospheric delays, and strategies on resolving the unknown integer ambiguities, etc. Therefore, most advanced scientific software should be adopted for GNSS baseline results with high precision; for example, GAMIT of Massachusetts Institute of Technology (MIT), GIPSY-OASIS developed by NASA's Jet Propulsion Laboratory (JPL), and Bernese GNSS Software developed by the Astronomical Laboratory of the University of Bern (AIUB), Switzerland. In this paper, data were processed using Bernese GNSS Software V5.2, which enables high-precision GNSS output. Bernese can accurately determine the ambiguity parameters for long-baseline (up to thousands of kilometers). In addition, Bernese Processing Engine (BPE) has been developed to automatically perform complex processes and large amounts of data. In this study, the optimally configured baselines were analyzed by connecting 24 domestic stations and 25 of IGS stations. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Station** & **Receiver** & **Antenna** & **Latitude** & **Longitude** & **Height** & **Organization** \\ \hline BOGG & SEPT POLARX5 & SEPCHOKE, B3E6 & 35.701 & 129.206 & 117.955 & KIGAM \\ CGUG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 35.819 & 129.269 & 191.804 & KIGAM \\ CHWN & TRIMBLE ALLOY & TRM59800.00 & 35.236 & 128.692 & 88.346 & NGII \\ DUCG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 35.744 & 129.176 & 101.967 & KIGAM \\ GCNG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 35.817 & 129.136 & 107.004 & KIGAM \\ GHDG & Trimble Alloy & TRM59800.00 & 35.270 & 128.985 & 50.0011 & NGII \\ GKPG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 35.890 & 128.606 & 110.664 & KIGAM \\ GYU & TRIMBLE NETR9 & HYCGCG601A & 35.755 & 129.039 & 225.153 & NGII \\ GYOI & Trimble Alloy & TRM59800.00 & 35.673 & 129.288 & 154.311 & NGII \\ HDBG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 35.733 & 129.398 & 180.316 & KIGAM \\ MYSO & Trimble Alloy & TRM59800.00 & 35.501 & 128.815 & 62.693 & NGII \\ POHG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 36.079 & 129.352 & 76.678 & KIGAM \\ POHN & Trimble NetR9 & HYCCGG601A & 35.910 & 129.402 & 130.743 & NGII \\ POSG & SEPT POLARX5 & SEPCHOKE\_B3E6 & 36.025 & 129.311 & 78.974 & KIGAM \\ PSJA & Trimble Alloy & TRM59800.00 & 35.382 & 129.248 & 148.601 & NGII \\ PUSN & TRIMBLE NETR9 & TRM59800.00 & 35.233 & 129.074 & 158.645 & NGII \\ TEGN & TRIMBLE NETR9 & TRM59800.00 & 35.906 & 128.801 & 106.377 & NGII \\ WOLS & TRIMBLE NETR9 & TRM59800.00 & 35.503 & 129.416 & 95.935 & NGII \\ WSJG & Trimble Alloy & TRM59800.00 & 35.565 & 129.317 & 100.631 & NGII \\ WSSN & Trimble Alloy & TRM59800.00 & 35.545 & 129.118 & 131.206 & NGII \\ YANS & SEPT POLARX5 & SEPCHOKE\_B3E6 & 35.345 & 129.068 & 233.777 & KIGAM \\ YCHG & Trimble Alloy & TRM59800.00 & 35.980 & 129.106 & 175.149 & NGII \\ YCIG & Trimble Alloy & TRM59800.00 & 36.052 & 129.040 & 200.111 & NGII \\ YCMP & Trimble Alloy & TRM59800.00 & 35.972 & 128.926 & 154.256 & NGII \\ \hline \hline \end{tabular}
\end{table} 
Table 1: A list of domestic GNSS stations.