Notices
Results 1 to 6 of 6

Thread: New radio telescope is super-smart

  1. #1 New radio telescope is super-smart 
    Forum Sophomore cleft's Avatar
    Join Date
    May 2005
    Posts
    137


    New radio telescope is super-smart

    One of the world's most powerful supercomputers is to be the brain of a revolutionary new radio telescope called LOFAR - the low-frequency array for radio astronomy. The telescope will map the Milky Way's magnetic field and seek sources of high-energy cosmic rays.

    But instead of using one large and expensive rigid dish, or a few tens of smaller dishes, LOFAR will use thousands of simple radio antennas distributed across the Netherlands and northern Germany. The signals will then be woven together at the University of Groningen in the Netherlands by Stella, a new supercomputer that is the third most powerful on the planet.

    LOFAR needs its own supercomputer because the ionosphere bends radio waves unpredictably, making any cosmic radio source "twinkle" like starlight. This can be compensated for by using some of the radio measurements to monitor the ionosphere, and modelling fluctuations in this signal with Stella.

    Source Here

    For More on LOFAR


    "Moral indignation is jealousy with a halo."
    - H. G. Wells (1866-1946)
    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Isotope (In)Sanity's Avatar
    Join Date
    Oct 2004
    Location
    Mesa AZ
    Posts
    2,697
    Hmm, the question is what will we gain from this "mapping"?

    So this computer is just behind the earth simulator? I'm pretty sure that's the second most powerful computer, having been recently beaten out by another from IBM. I bet the Japanese were not happy about that.


    Reply With Quote  
     

  4. #3  
    Forum Sophomore cleft's Avatar
    Join Date
    May 2005
    Posts
    137
    LOFAR will use radio telescope type mapping, trying for wide area scattered across The Netherlands and German to obtain resolution by dispersal. Using the computer to do the baseline for correction data. One of our largest problems has been that observation from within the atmosphere has always been affected by the distortion of the atmosphere.

    If partial suscessful I look for this project to attempt to gain a larger base line by expanding. No matter if the computer is second or third or even fourth, it still will have one heck of a capacity for computations.
    "Moral indignation is jealousy with a halo."
    - H. G. Wells (1866-1946)
    Reply With Quote  
     

  5. #4  
    Forum Sophomore DEChengst's Avatar
    Join Date
    Oct 2004
    Location
    NLA0:
    Posts
    121
    Good to see that the Dutch are still a leading nation in the field of radio astronomy. I'm wondering what we'll discover with LOFAR.
    PDP, VAX and Alpha fanatic ; HP-Compaq is the Satan! ; Let us pray daily while facing Maynard! ; Life starts at 150 km/h ;
    Reply With Quote  
     

  6. #5  
    Forum Freshman kestasjk's Avatar
    Join Date
    May 2005
    Posts
    74
    I don't understand how you can reliably rebuild a blurred image once it has been through the atmosphere. I can understand sharpening the image and filtering out noise, but that wouldn't require a supercomputer..
    Reply With Quote  
     

  7. #6  
    Forum Sophomore cleft's Avatar
    Join Date
    May 2005
    Posts
    137
    What the computer is doing is taking sampling from some of the data recieved to determine atmospheric distortion. Since the distortion is never consistantly the same and varies from moment to moment this is a sort of time sample to be applied to that one specific area of the atmosphere for that one specific moment to give a correction factor to clear the image.

    In visual astromony much the same is applied through inferometer (sp?) readings, though not supported in exaclty the same manner, to clear photos that would otherwise also have distortion.
    "Moral indignation is jealousy with a halo."
    - H. G. Wells (1866-1946)
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •