Numerous studies for improving gravity field determination from future gravity missions beyond the GRACE/GRACE-FO missions have been proposed during the last decade. In this contribution, full-scale simulated observations of four satellite missions, namely Bender-, Cartwheel-, Helix- and Pendulum-type, in addition to GRACE-FO as a reference mission will be used to retrieve the total water storage over the Nile River Basin (NRB). The findings show a superiority of investigated configurations in retrieving the total water storage (TWS) w.r.t. the GRACE-FO mission. Moreover, the Bender-type provides improved global TWS recovery showing the least standard deviations (STD) of about 3.43cm in terms of equivalent water heights (EWH) (up to d/o 80). The Pendulum, Cartwheel and Helix missions provide STD of about 6.34cm, 8.35cm and 5.78cm in terms of EWH, respectively. In addition, the Bender-type provides improved local TWS recovery over the NRB without any distortion w.r.t. both the “simulated” and “real” GRACE-FO solutions.

在过去十年中，已经提出了许多研究来改进 GRACE/GRACE-FO 任务之外的未来重力任务的重力场确定。在这项贡献中，除了 GRACE-FO 作为参考任务外，还将使用四个卫星任务（即 Bender 型、Cartwheel 型、Helix 型和 Pendulum 型）的全尺寸模拟观测来检索尼罗河上的总储水量流域 (NRB)。研究结果表明，研究配置在检索 GRACE-FO 任务的总储水量 (TWS) 方面具有优势。此外，Bender 型提供了改进的全球 TWS 采收率，在等效水高 (EWH) 方面（高达 d/o 80）显示出约 3.43 厘米的最小标准偏差 (STD)。Pendulum、Cartwheel 和 Helix 任务在 EWH 方面提供约 6.34cm、8.35cm 和 5.78cm 的 STD，分别。此外，Bender 类型在 NRB 上提供了改进的本地 TWS 恢复，而“模拟”和“真实”GRACE-FO 解决方案没有任何失真。