In this work, the principal aim is to evaluate some recent GGMs on the Gulf of Guinea region using shipborne free-air gravity data. Two types of GGMs are evaluated in this study: combined models (EGM2008, EIGEN-6C4, GECO, SGG-UGM-1, GOCO05C and XGM2016) and satellite-only models (DIR_R5, ITU_GGC16, SPW_R5, TIM_R5, GGM05G and NULP_02S). The comparisons between these GGMs and the preliminary filtered shipborne gravity data were performed before and after the Spectral Enhancement Method (SEM). The statistical results have shown that the combined models have a better performance than the satellite-only models. Before and after SEM, we note that the EGM2008 model presents the best statistical results compared to the shipborne gravity anomalies (RMS and SD values respectively changes from 3.87 to 3.55 mGal and from 3.57 to 3.32 mGal). However, the DIR_R5 model is the best of the satellite-only GGMs of this study.

在这项工作中，主要目的是使用船载自由空气重力数据评估几内亚湾地区最近的一些 GGM。本研究评估了两种类型的 GGM：组合模型（EGM2008、EIGEN-6C4、GECO、SGG-UGM-1、GOCO05C 和 XGM2016）和仅卫星模型（DIR_R5、ITU_GGC16、SPW_R5、TIM_R5、GGM05G 和 NULP_02S）。这些 GGM 与初步过滤的船载重力数据之间的比较是在光谱增强方法 (SEM) 之前和之后进行的。统计结果表明，组合模型比仅卫星模型具有更好的性能。在 SEM 之前和之后，我们注意到 EGM2008 模型与船载重力异常相比呈现出最好的统计结果（RMS 和 SD 值分别从 3.87 到 3.55 mGal 和从 3.57 到 3.32 mGal 变化）。然而，