5 ms·
I thought they used rubidium, with cesium standards on the ground to broadcast corrections.
by madengr 9y ago
I thought they used rubidium, with cesium standards on the ground to broadcast corrections.
- ceejayoz 9y agoInteresting - looks like they have two rubidium, two cesium. Rubidium's an order of magnitude more variable than cesium - 10^−12 - strontium will be a big improvement either way.