Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

MoD’s ‘quantum compass’ offers potential to replace GPS

Discussion in 'General Discussion' started by Fred_C_Dobbs, May 15, 2014.

  1. Fred_C_Dobbs

    Joined:
    May 14, 2014
    Messages:
    26
    Likes Received:
    2
    Location:
    Crestview, FL
    Thought you guys might be interested in this article. Hopefully I inserted the link correctly, this is my first post.

    http://www.ft.com/cms/s/0/4cac5a24-db68-11e3-94ad-00144feabdc0.html#ixzz31oo5OEED

    Some interesting quotes from the article:

     
  2. UrAwFuL

    Joined:
    Apr 18, 2014
    Messages:
    622
    Likes Received:
    12
    Location:
    Los Angeles, CA
    That last quote sounds like the mother cause of flyaways. :shock:
     
  3. Fred_C_Dobbs

    Joined:
    May 14, 2014
    Messages:
    26
    Likes Received:
    2
    Location:
    Crestview, FL
  4. Fred_C_Dobbs

    Joined:
    May 14, 2014
    Messages:
    26
    Likes Received:
    2
    Location:
    Crestview, FL
    Well crud, that one does the same thing. If you want to read the article you can 'register' using a temporary email address (10 minute email, yopmail, etc.).

    Or if needed I can just cut and paste the entire article.
     
  5. N017RW

    Joined:
    May 2, 2014
    Messages:
    6,236
    Likes Received:
    1,611
    Location:
    Palm Beach Co.- FL
    C'mon, seriously?

    Worst case, using the values cited, a 25 min. flight, and linear progression,there would be 17m or ~57ft of accumulated 'innacuracy'.
     
  6. dkatz42

    Joined:
    Jan 16, 2014
    Messages:
    165
    Likes Received:
    1
    Location:
    New Mexico, USA
    Too much trouble to read the article, so I may be all wet, but it seems as though they're talking about improving inertial navigation with this, as GPS doesn't accumulate errors in this way. If you're tooling along in a submarine, for example, you get a position fix and then try to keep track of where you are by basing it on where you were and how you've been moving since, and this scheme will quickly accumulate error. But with GPS you're getting a fresh fix every second or faster (my full-scale airplane does five fixes per second, I think) so this presumably doesn't apply.
     
  7. ElGuano

    Joined:
    Sep 4, 2013
    Messages:
    2,219
    Likes Received:
    4
    I don't get that sense from the synopsis (also didn't get through the reg-wall). It sounds like they're using a magnetometer-like device that is sensitive enough to detect and differentiate the unique magnetic field of any given region. So they would be need a pretty big lookup table, but it would be an absolute position and not relative from start point.

    The "accumulation of errors" quote seems to be describing existing inertial navigation, not this method.
     
  8. dkatz42

    Joined:
    Jan 16, 2014
    Messages:
    165
    Likes Received:
    1
    Location:
    New Mexico, USA
    Yes, this was my take as well, sorry for not being clear.