Spatial Information Research Institute installed 30 GNSS sites on the Korean Peninsula to study cadastral surveying and spatial information. In 2013, MAC RTK service technique was researched using the SpiderNet S/W, Leica Corp., the RTK NTRIP service was started from July 2014. In this study, we introduce the GNSS network installed by LX KCSC. LX GNSS network consists of 30 GNSS sites and a central server system: The GNSS site is equipped with a set of GNSS antenna and receiver (Trimble, Javad, Septentrio); The central server system a RTK server, a backup server, and an analysis server. MAC RTK correction data is generated the RTK server. GNSS raw measurements and 1h-, 24h-RINEX are stored the data backup server. The analysis server checks the quality of the 24h-RINEX and monitors variations of coordinates of the GNSS sites using TEQC and GIPSY-OASIS. Additional, we installed a temporary reference point at Han River Park in Seoul to analyze performance of the LX GNSS RTK service. To compare with the accuracy, NGII VRS results were assumed true value. As a result, precision of the both RTK service is similar to as much as 5 mm, difference of initialization time between NGII VRS and LX MAC is 8 seconds on average, and difference of horizontal coordinates are 2-3cm on average. This result is similar level when compared with the NGII VRS and Seoul VRS.

Keywords: LX GNSS network, GNSS permanent station, cadastral surveying, spatial information