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Pinboard

@Pinboard

The light inside is broken, but I still work. The Cadillac of online bookmarking sites. Alleged nocoiner. http://pinboard.in  maciej@ceglowski.com +1 415 610 0231

Lonely street of broken dreams
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    1. Pinboard‏ @Pinboard 22 Jan 2020

      Humanity will never go to Mars in numbers (all our stuff is here), but Elon Musk's great legacy will be destroying the night sky for terrestrial astronomy. A fitting monument to our age

      9 replies 33 retweets 143 likes
      Show this thread
    2. Matthew Hardeman‏ @mdhardeman 22 Jan 2020
      Replying to @Pinboard

      If the network being built can provide for high quality ubiquitous broadband globally, even if the sky impact were that bad, it might be a worthwhile trade off. Too much of the US lacks decent broadband, worse in many less developed nations.

      1 reply 0 retweets 1 like
    3. Jim Troutman‏ @troutman 22 Jan 2020
      Replying to @mdhardeman @Pinboard

      The only reason it lacks that broadband is due to systematic plundering of government funding sources by incumbents who didn’t spend it on fiber upgrades, due to regulatory capture over the last 20 years. Compared to cost of sat fleet replacement every 5 years, it would be cheap.

      2 replies 0 retweets 10 likes
    4. Matthew Hardeman‏ @mdhardeman 22 Jan 2020
      Replying to @troutman @Pinboard

      Oh I’m well aware. Then again, I’m aware of places in this country where there are single family residences with at least 10 miles of isolation to the next household. There’s no commercial model for building infra to them.

      2 replies 0 retweets 2 likes
    5. Matthew Hardeman‏ @mdhardeman 22 Jan 2020
      Replying to @mdhardeman @troutman @Pinboard

      I’ve seen glimpses of what LEO sat networks can do. I have Garmin devices on the Iridium net that can talk anywhere on earth (low bw) but the proof of concept is there. Something like Starlink can theoretically work and cover whole planet.

      1 reply 0 retweets 0 likes
    6. Jim Troutman‏ @troutman 22 Jan 2020
      Replying to @mdhardeman @Pinboard

      The real question is what the actual subscription price of these services will be, and the long term (10-20 year) operating costs will be (even with reduced launch costs). Unlike fiber networks, they have to 100% replace the entire space infrastructure every 5 years.

      1 reply 0 retweets 2 likes
    7. Matthew Hardeman‏ @mdhardeman 22 Jan 2020
      Replying to @troutman @Pinboard

      I’m pretty sure Starlink’s intended service life is supposed to be 20+ years, with presumed network rotation over 5ish years. Iridium replaced their whole fleet similarly (and at much lower cost second time).

      1 reply 0 retweets 0 likes
    8. Jim Troutman‏ @troutman 22 Jan 2020
      Replying to @mdhardeman @Pinboard

      No. The satellites run out of fuel to stay in orbit and burn up.https://www.google.com/amp/s/www.cnbc.com/amp/2019/11/11/watch-spacex-livestream-launching-second-starlink-internet-mission.html …

      2 replies 0 retweets 3 likes
      Pinboard‏ @Pinboard 22 Jan 2020
      Replying to @troutman @mdhardeman

      They will be launching satellites to 1,110 km orbits, which take centuries to decay.

      11:41 AM - 22 Jan 2020
      • 2 Likes
      • Eli Courtwright Tamschi (🏠)
      2 replies 0 retweets 2 likes
        1. Matthew Hardeman‏ @mdhardeman 22 Jan 2020
          Replying to @Pinboard @troutman

          Eventually, yes. But there’s a lot more real estate in an orbital at 1110km than at 500km. The ones up there will matter far less.

          0 replies 0 retweets 0 likes
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        2. Jim Troutman‏ @troutman 22 Jan 2020
          Replying to @Pinboard @mdhardeman

          According to Wikipedia only some of the orbits are that high. Most at 550km or 340km.

          1 reply 0 retweets 1 like
        3. Matthew Hardeman‏ @mdhardeman 22 Jan 2020
          Replying to @troutman @Pinboard

          And again the impact of a satellite in that orbital is far lesser from an earth station viewpoint than one in closer. There’s a LOT more surface area in a spherical surface described as 1100km up versus 550km up.

          0 replies 0 retweets 0 likes
        4. End of conversation

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