Euler Poles Determination of Southern Sunda Microblocks Base on GNSS GPS Observations

Determination of Current Instantaneous Euler Poles is a geodetic contribution for the geo-kinematic determination of the earth by using ideal spherical assumptions. The Euler pole parameters are estimated based on the shift or movement speed of a minimum of three GNSS-GPS stations located in the same rigid zone. By applying four geometric calculation methods (LI-Norm Minimization or Least Absolute Deviation/Error, best fitting L2-Norm Minimization, distance or/and time weighting), the stability of the estimation result given the sensitivity to the distribution pattern of GNSS GPS observation is not homogeneous in plates / blocks. The absolute residuals of the observations with the Euler polar velocity estimation results indicate the presence of the stations within or outside the rigid zone. By applying all of the mentioned steps, a stable estimation value of the Java-Sumba-South Sulawesi micro-blocks Euler poles of absolute residuals is about 2–3 mm/year, and these parameters are used as geo-kinematic information.