International Gnns Service Station Absolute Position Monitoring

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International GNSS Service Stations are worldwide GPS data observation stations. Observation from this station has an important role, specifically to geographic. Because of tectonic movement phenomena, making possible velocity movement of IGS stations. The consequence from that velocity movement is an IGS stations position movement so it need a research about monitoring absolute position IGS station to do analysis the change of absolute coordinate value toward absolute positioning standard deviation value. This research using compact RINEX data from IGS stations observation over the years product, to be precise from 2001 until 2011. First step, has to do downloading compact RINEX data, then execute selecting the result observation IGS station data. The next step RINEX data processed by TopconTools v.8 software then do processing by import rapid ephemeris data, then can get an absolute coordinate value. Afterward, IGS station absolute coordinate value included in AutoCAD. In the last step calculation did in order to after standard deviation value, and making an absolute coordinate component value graph from every IGS station.

The research from this thesis indicate there’s no significant change in horizontal component. By the result, the biggest average sequential value atrributed to RABT Marocco station with the value is 0,3577 meter. the lowest average sequential value atrributed to NYAL Norway station with the value is 0,0944 meter. The biggest standard deviation value of absolute coordinate component atrributed to RABT Marocco station with the value is σ N : ± 0,511 , σ E : ± 0,289 , σ El : 2,312. Whereas the lowest standard deviation value of absolute coordinate component atrributed to NYAL Norway station with the value is σ N : ± 0,095 , σ E : ± 0,041 , σ El : 0,351.
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