Determine whether atom-referenced stability provides a long-duration navigation advantage

Determine whether atom-referenced bias stability provides an endurance advantage for fully closed gravity-aided navigation campaigns lasting multiple weeks, after accounting for the gravity ties, empirical drift models, and crossover corrections available to classical systems.

Background

The paper demonstrates GNSS-free gravity-aided navigation over an approximately six-hour maritime trajectory and reports a 56-hour stationary measurement showing long-term stability of the atom-referenced hybrid sensor. However, it does not establish whether that stability translates into a practical endurance advantage during a fully closed, multi-week navigation mission.

The unresolved issue requires comparing the quantum sensor’s atom-referenced bias stability with the correction strategies used by classical systems, including absolute gravity ties, empirical drift models, and crossover corrections. A long-duration campaign would test whether these differences materially affect navigation performance over operationally relevant timescales.

References

The first priority for future work is to extend these demonstrations to a long-duration, fully closed navigation campaign. Extending the present 6 h GNSS-free navigation experiment through multi-week operation is necessary to test whether atom-referenced bias stability produces an endurance advantage after the gravity ties, empirical drift models and crossover corrections available to classical systems are taken into account.

— GNSS-free quantum gravity-aided navigation and fine-scale marine surveying with a strapdown quantum gravimeter  (2608.25563 - Everitt et al., 26 Aug 2026) in Discussion, paragraph beginning “The first priority for future work”