The polar extended gravity field model TIM_R6e

TIM_R6e is an extended version of the satellity-only global gravity field model TIM_R6 (Brockmann et al., 2019) which includes additional terrestrial gravity field observations over GOCE's polar gap areas. The included terrestrial information consists of the PolarGap campaign data (Forsberg et al., 2017) augumented by the AntGG gravity data compilation (Scheinert et al., 2016) over the southern polar gap (>83°S) and the ArcGP data (Forsberg et al. 2007) over the northern polar gap (>83°N). The combination is performed on normal equation level, encompassing the terrestrial data as spectrally limited geographic 0.5°x0.5° grids over the polar gaps.

TIM_R6e是仅卫星的全球重力场模型TIM_R6（Brockmann等人，2019）的扩展版本，纳入了GOCE极地空白区域的额外地面重力场观测数据。所纳入的地面信息包括PolarGap campaign数据（Forsberg等人，2017），并辅以南极空白区域（>83°S）的AntGG重力数据汇编（Scheinert等人，2016）和北极空白区域（>83°N）的ArcGP数据（Forsberg等人，2007）。该组合在法方程（normal equation）层面进行，将地面数据作为极地空白区域内光谱受限的0.5°×0.5°地理网格纳入其中。