Local geoid modeling in the central part of Java, Indonesia, using terrestrial-based gravity observations  

作　　者：Rahayu Lestari Brian Bramanto Kosasih Prijatna Arisauna M.Pahlevi Widy Putra Raa Ina Sidrotul Muntaha Febriananda Ladivanov 

机构地区：[1]Departement of Geodesy and Geomatics Engineering,Faculty of Earth Sciences and Technology,Institut Teknologi Bandung,Indonesia [2]Geodesy Research Group,Faculty of Earth Sciences and Technology,Institut Teknologi Bandung,Indonesia [3]Geodetic and Geodynamic Control Network Center,Geospatial Information Agency of Indonesia(BIG),Indonesia

出　　处：《Geodesy and Geodynamics》2023年第3期231-243,共13页大地测量与地球动力学（英文版）

摘　　要：The Global Navigation Satellite System(GNSS)positioning method has been significantly developed in geodetic surveying.However,the height obtained through GNSS observations is given in a geodetic height system that needs to be converted to orthometric height for engineering applications.Information on geoid height,which can be calculated using the global geopotential mode,is required to convert such GNSS observations into orthometric height.However,its accuracy is still insufficient for most engineering purposes.Therefore,a reliable geoid model is essential,especially in areas growing fast,e.g.,the central part of Java,Indonesia.In this study,we modeled the local geoid model in the central part of Java,Indonesia,using terrestrial-based gravity observations.The Stokes'formula with the second Helmert's condensation method under the Remove-Compute-Restore approach was implemented to model the geoid.The comparison between our best-performing geoid model and GNSS/leveling observations showed that the standard deviation of the geoid height differences was estimated to be 4.4 cm.This geoid result outperformed the commonly adopted global model of EGM2008 with the estimated standard deviation of geoid height differences of 10.7 cm.

关 键 词：Gravimetric geoid Stokes integration Second Helmert's condensation method GNSS/Leveling 

分 类 号：P223[天文地球—大地测量学与测量工程]