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icw

HN member
Joined
Mon, Mar 03, 2014, 6:02 PM UTC
HN karma
6
Public activity
9 items

About icw

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Recent public activity

  1. comment
    Comment #14054117

    I'm a little late to the party, but I did a similar study on ridesharing's influence on DWI rates in Austin, TX before and after Uber and Lyft arrived and then exited the city, you…

  2. comment
    Comment #9912199

    Forward error correction can add significant overhead. From the specification of the RF subsystem posted earlier ( http://www.boulder.swri.edu/~tcase/NH%20RF%20Telecom%20Sys%2... )…

  3. comment
    Comment #9912179

    New Horizons is using a 1/6 rate Turbo code for forward error correction, meaning 5/6 of the data returned is redundant. Previous discussion: https://news.ycombinator.com/item?id=9…

  4. comment
    Comment #8948054

    Much faster data rates I suspect - you can spend some of that on forward error correction to compensate for rain fade.

  5. comment
    Comment #7932603

    Pretty much - call that antenna gain, it's much cheaper to put bigger and better hardware on the ground. Recall though that the signal still goes through a TDRSS satellite, which a…

  6. comment
    Comment #7932517

    Other more obscure methods of communicating with the ISS include the Russian Lira and Regul systems as well as the Japanese Ka-band dish on the external lab.

  7. comment
    Comment #7932460

    Can't speak for S-band, but Ku-band data rates are 25 Mbps Earth-to-ISS and 300 Mbps ISS-to-Earth, which is the maximum supported by TDRSS Ku-band links. Data rates may drop a bit …

  8. comment
    Comment #7932367

    Elaborating on TDRSS a little bit - the ISS has allotments on both S- and Ku-band transponders (there are several per satellite) and hands off between satellites (TDRSS is geostati…

  9. comment
    Comment #7344824

    Try space-filling curves! http://www2.isye.gatech.edu/~jjb/mow/mow.html