  Cold Atom Interferometry (CAI) accelerometers and gradiometers have emerged
as promising candidates for future gravimetric satellite missions due to their
potential for detecting gravitational forces and gradients with high precision
and accuracy. Current satellite gravimetry missions have demonstrated the
utility of gravity data in understanding global mass transport phenomena,
climate dynamics, and geological processes. However, state-of-the-art
measurement techniques face noise and long-term drift limitations, which might
propagate on the recovery of Earth's time-varying gravity field. Quantum
sensors, particularly atom interferometry-based devices, offer promise for
improving the accuracy and stability of space-based gravity measurements. This
study explores the sensitivity of CAI accelerometers and gradiometers. We
explore the low-low satellite-to-satellite and gravity gradiometry measurements
to build analytical models of measurements and associated errors. We selected
an ambitious scenario for CAI parameters that illustrates a potential path for
increasing instrument accuracies and capabilities for space gravimetry. Two
operational modes, concurrent and sequential, are compared to mitigate the
effects of inaccurately known attitude rates on Coriolis accelerations. The
sequential mode shows the potential to reduce these effects since the atom
cloud has initial zero velocity, otherwise the Corilis effects are dominant in
the concurrent operational mode. The CAI configuration considered in this study
allows for the time variable gravity signal to be observed for the case of
low-low Satellite-to-Satellite Tracking missions, but is inadequate to gravity
gradient missions because of the reduced signal amplitude.
