3 ms·
With a clock and a telescope, you can get super precise positioning the same as the 16th century way... Atomic clocks are now good enough to make those posit
by londons_explore 3y ago
With a clock and a telescope, you can get super precise positioning the same as the 16th century way... Atomic clocks are now good enough to make those positions really good.
You can do the same with radio frequencies and a phased array antenna if you like.
I'm not sure if other approaches would perform better.
- DoctorOetker 3y agoI mean without a clock, the reference being the direct path of noise from the sun. Telescopes are impeded by clouds. During night there is no line of sight to the sun, so I concede my rudimentary idea or question has similar drawbacks.
- DoctorOetker 3y agoIt would be interesting if precise time could be derived from imaging the night sky, so that the synchronized clock becomes unnecessary.
- amalcon 3y agoI've actually heard of research into putting celestial navigation in guided missiles (from people who've worked on it -- so the idea that this is possible seems to not be a secret). Cameras and optics have become good enough to make this plausible with those kind of constraints. I don't know if it's been deployed, but I would not be surprised.
- nradov 3y agoSome ballistic missiles have already been using celestial navigation operationally for decades. That is used primarily during the mid-course phase, and then they switch over to inertial (or maybe radar in a few cases) for the terminal phase.
- kcb 3y agohttps://en.wikipedia.org/wiki/UGM-133_Trident_II https://en.wikipedia.org/wiki/UGM-133_Trident_II