3 ms·

If you included skyscrapers I bet you'd have the same list no changes. Most of these mountains are > 2km tall.

newman8r 9y ago
you'd still probably have one of those coordinates (of the tall mountain) remain the same, then find a tower that goes even further than the second point - although I never assume my logic is correct in geodesy/astronomy, especially when I'm tired edit* - in practice you're probably right
- deleted 9y ago
  [deleted]
- jdironman 9y ago
  Laser powered ISPs anyone? I kid, but is this a possibility?
  - URSpider94 9y ago
    This exists already, from some pretty serious telecom companies, for distances of a few miles. The problem is that, in optical wavelengths, there's too much absorption and scattering in the atmosphere - fog, rain, storms, smog, smoke - that can disrupt the signal. But, in radio frequencies, this is how the microwave tower communications network works -- it's line-of-sight from tower to tower. https://www.wired.com/2015/03/spencer-harding-the-long-lines/ https://www.wired.com/2015/03/spencer-harding-the-long-lines...
    - kbart 9y ago
      Microwave LoS is still widely used to connect cell towers for example. Look at these circular dishes in this picture[1]. 1. https://ssl.c.photoshelter.com/img-get2/I0000JUzapOxgCs0/fit=1000x750/1127D-cellular-microwave-communications-tower-antenna-array.jpg https://ssl.c.photoshelter.com/img-get2/I0000JUzapOxgCs0/fit...
      - URSpider94 9y ago
        The microwave network is being resurrected between Chicago and NYC as a way to shorten the communications time for high frequency traders. Even after successively purchasing straighter and straighter rights of way for fiber, the microwave path is still shorter.
    - newman8r 9y ago
      Nice article, now I need to plan a hiking trip to see one of the old towers. wikipedia mentions that the longest microwave link is ~200 miles, but it's 2GHz and from the 1970s. I wonder what the limits for higher frequencies might be.

you'd still probably have one of those coordinates (of the tall mountain) remain the same, then find a tower that goes even further than the second point - although I never assume my logic is correct in geodesy/astronomy, especially when I'm tired edit* - in practice you're probably right

deleted 9y ago
[deleted]
jdironman 9y ago
Laser powered ISPs anyone? I kid, but is this a possibility?
- URSpider94 9y ago
  This exists already, from some pretty serious telecom companies, for distances of a few miles. The problem is that, in optical wavelengths, there's too much absorption and scattering in the atmosphere - fog, rain, storms, smog, smoke - that can disrupt the signal. But, in radio frequencies, this is how the microwave tower communications network works -- it's line-of-sight from tower to tower. https://www.wired.com/2015/03/spencer-harding-the-long-lines/ https://www.wired.com/2015/03/spencer-harding-the-long-lines...
  - kbart 9y ago
    Microwave LoS is still widely used to connect cell towers for example. Look at these circular dishes in this picture[1]. 1. https://ssl.c.photoshelter.com/img-get2/I0000JUzapOxgCs0/fit=1000x750/1127D-cellular-microwave-communications-tower-antenna-array.jpg https://ssl.c.photoshelter.com/img-get2/I0000JUzapOxgCs0/fit...
    - URSpider94 9y ago
      The microwave network is being resurrected between Chicago and NYC as a way to shorten the communications time for high frequency traders. Even after successively purchasing straighter and straighter rights of way for fiber, the microwave path is still shorter.
  - newman8r 9y ago
    Nice article, now I need to plan a hiking trip to see one of the old towers. wikipedia mentions that the longest microwave link is ~200 miles, but it's 2GHz and from the 1970s. I wonder what the limits for higher frequencies might be.