In radio astronomy, more precise clocks can directly improve the quality/resolution of observations.

> Data received at each antenna in the array include arrival times from a local atomic clock, such as a hydrogen maser. At a later time, the data are correlated with data from other antennas that recorded the same radio signal, to produce the resulting image. The resolution achievable using interferometry is proportional to the observing frequency.

https://en.wikipedia.org/wiki/Very-long-baseline_interferome...