Royal Navy installs quantum clock in robotic submarine 20 hours ago (newatlas.com) 3 comments wjSgoWPm5bWAhXB Reply Add to library davidwritesbugs 19 hours ago "Boil it down and this means the quantum clock loses only one second every 30 billion years, which, for navigation purposes, means a drift of a mere 1 x 10⁻⁶ degrees per hour. "What does this mean in terms of metres off a desired position? foxyv 18 hours ago A nautical mile is 1852 meters1 degree of latitude is 60 nautical miles1 millionth of a degree is 0.1 metersSo they lose about 2.4 meters of accuracy per day or about 0.9km per year. Which is pretty good for nautical navigation purposes. londons_explore 16 hours ago But for that to be useful you also need to measure the angle between the sun and gravity accurate to a millionth of a degree...Is such a thing possible?
davidwritesbugs 19 hours ago "Boil it down and this means the quantum clock loses only one second every 30 billion years, which, for navigation purposes, means a drift of a mere 1 x 10⁻⁶ degrees per hour. "What does this mean in terms of metres off a desired position? foxyv 18 hours ago A nautical mile is 1852 meters1 degree of latitude is 60 nautical miles1 millionth of a degree is 0.1 metersSo they lose about 2.4 meters of accuracy per day or about 0.9km per year. Which is pretty good for nautical navigation purposes. londons_explore 16 hours ago But for that to be useful you also need to measure the angle between the sun and gravity accurate to a millionth of a degree...Is such a thing possible?
foxyv 18 hours ago A nautical mile is 1852 meters1 degree of latitude is 60 nautical miles1 millionth of a degree is 0.1 metersSo they lose about 2.4 meters of accuracy per day or about 0.9km per year. Which is pretty good for nautical navigation purposes. londons_explore 16 hours ago But for that to be useful you also need to measure the angle between the sun and gravity accurate to a millionth of a degree...Is such a thing possible?
londons_explore 16 hours ago But for that to be useful you also need to measure the angle between the sun and gravity accurate to a millionth of a degree...Is such a thing possible?
"Boil it down and this means the quantum clock loses only one second every 30 billion years, which, for navigation purposes, means a drift of a mere 1 x 10⁻⁶ degrees per hour. "
What does this mean in terms of metres off a desired position?
A nautical mile is 1852 meters
1 degree of latitude is 60 nautical miles
1 millionth of a degree is 0.1 meters
So they lose about 2.4 meters of accuracy per day or about 0.9km per year. Which is pretty good for nautical navigation purposes.
But for that to be useful you also need to measure the angle between the sun and gravity accurate to a millionth of a degree...
Is such a thing possible?