We compute a new gravimetric geoid model for Peninsular Malaysia (PMGG2020) based on the Royal Institute of Technology (KTH) method. The PMGG2020 was computed from 8474 terrestrial gravity points, satellite altimetry-derived gravity anomaly (DTU17), 24,855 airborne gravity data, and the TanDEM-X Digital Elevation Model. All the gravity datasets were combined and gridded onto a 1-min resolution using the 3D Least Square Collocation (LSC) method with EIGEN-6C4 as the reference field. GO_CONS_GCF_2_SPW_R4 was used to provide long wavelengths of gravity field up to 130 maximum degrees and order in the geoid computation. Based on an evaluation using 173 Global Navigation Satellite System (GNSS)-levelling points distributed over Peninsular Malaysia, the precision of the PMGG2020 was 0.058 m. It is almost identical to the accuracy of the official Peninsular Malaysia gravimetric geoid, WMG03A. Using airborne gravity, the precision of PMGG2020 showed a significant improvement of ~4 cm over the existing KTH-derived geoid model, PMSGM2014. These results highlight the significant effect of airborne gravity data on the accuracy of the geoid model.

我们基于皇家理工学院 (KTH) 方法计算了马来西亚半岛的新重力大地水准面模型 (PMGG2020)。PMGG2020 是根据 8474 个地面重力点、卫星测高衍生的重力异常 (DTU17)、24,855 个空中重力数据和 TanDEM-X 数字高程模型计算得出的。使用 3D 最小二乘搭配 (LSC) 方法以 EIGEN-6C4 作为参考场，将所有重力数据集组合并网格化为 1 分钟分辨率。GO_CONS_GCF_2_SPW_R4 用于在大地水准面计算中提供高达 130 度和阶次的长波长重力场。根据使用分布在马来西亚半岛的 173 个全球导航卫星系统 (GNSS) 水准点的评估，PMGG2020 的精度为 0.058 m。它几乎与马来西亚半岛官方重力大地水准面 WMG03A 的精度相同。使用空气重力，PMGG2020 的精度比现有的 KTH 衍生大地水准面模型 PMSGM2014 显着提高了约 4 厘米。这些结果突出了航空重力数据对大地水准面模型精度的显着影响。