System studies for an optical gradiometer mission (B07)

我们的目标是根据惯性传感器技术的最新发展，特别是激光干涉计量学，探索未来空间重力梯度测量飞行任务的潜力。 首先，我们将调查对主要参数（噪声水平，校准精度，动态范围等）的要求。在测量过程中所涉及的不同传感器之间的关系，而且还考虑到完整的梯度测量使命（轨道，无阻力控制）。第二，根据可行性研究中所作的假设，我们将分析和量化这种空间梯度测量使命的科学惠益，特别是在恢复地球随时间变化的重力场方面。

Our objective is to explore the potential of future space gravity gradiometry missions in the light of the newest developments in inertial sensor technology, with a special emphasis on laser interferometry metrology. First, we will investigate what are the requirements on the main parameters (noise level, calibration accuracy, dynamic range, etc.) of the different sensors involved in the measurement process, but also when considering the full gradiometry mission (orbit, drag-free control). Second, and based on assumptions made in a feasibility study, we will analyse and quantify the science benefits of such a space gradiometry mission, in particular for the recovery of the Earth's time-variable gravity field.