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  • Parhelia (Sundogs)

    Hy folks,

    I´ve found something about Parhelia, or let´s better say the Sundogs (note there is more than one!!)

    Maybe it _is_ a multi-cpu-card after all?...


    see also this thread:



    ----------------------------
    Parhelia (Sundogs)

    Crystal Orientation: Basal face horizontal

    Ray Path: 3-7

    Occurrence: very frequently
    60-80 days per year

    Parhelia appear to the observer as bright spots in the sky, one on either side of the Sun. The spots are situated on a line through the Sun parallel with the horizon. If the Sun is low, each is separated from
    the Sun by an arc of 22°, and both lie on the 22°halo. As the Sun climbs higher in the sky, the parhelia move away from the 22° halo, although they remain on the line through the Sun parallel with the horizon. If the Sun's declination (angular distance above the horizon) is 40°, the parhelia are then seen 27.6°of arc from the Sun.
    Parhelia frequently are very colorful. Hues of red lie toward the Sun. Fully developed, they have a long, white-blue tail extending away from the Sun parallel to the horizon. Parhelia are sometimes so bright
    that observers are dazzled. Parhelia are caused by flat, plate-shaped hexagonal ice prisms. If these plate crystals fall unimpaired, drag forces automatically orient them horizontally. The more the ice crystals are oriented horizontally, the brighter the parhelia appear to be. Frequently the parhelia are visible while the 22 °halo is not visible. This phenomenon is observed when almost all the ice crystals are oriented horizontally, and few are
    oriented at other angles. There is an interesting relationship between parhelia and the circumzenith arc. Both are caused by horizontally aligned plate crystals. Therefore one can say that if parhelia are visible there is a good chance to see the circumzenith arc, particularly when the sun's declination is between 15°and 25°.
    Last edited by Schattenreiter; 12 February 2002, 15:41.
    There is no weakness, but to cringe and despair because one thinks oneself weak.
    For so long as one´s will is undefeated one is strong, for so long as the desire for revenge still endures.
    -Tom Holland, Deliver us from Evil

  • #2
    to a murcer who took part in last years speculations, that is already known, we even had a picture of a parhelia and noticed how similar it is to the matrox logo, i dont feel like digging out the specific thread(s) right now, though

    Comment


    • #3
      Ups... sorry I did not know that.

      Guess that´s one of these newbie mistakes you do sometimes, though!
      There is no weakness, but to cringe and despair because one thinks oneself weak.
      For so long as one´s will is undefeated one is strong, for so long as the desire for revenge still endures.
      -Tom Holland, Deliver us from Evil

      Comment


      • #4
        war kein vorwurf, nur ein hinweis, ehrlich


        edit:

        here it is (its a totally redesigned graphics engine )

        Last edited by Topha; 12 February 2002, 16:05.

        Comment


        • #5
          That's no mistake.

          But I see a great future MURCer in you...

          Comment


          • #6
            <-----

            Core2 Duo E7500 2.93, Asus P5Q Pro Turbo, 4gig 1066 DDR2, 1gig Asus ENGTS250, SB X-Fi Gamer ,WD Caviar Black 1tb, Plextor PX-880SA, Dual Samsung 2494s

            Comment


            • #7
              Kein Problem, Topha!

              I am looking forward to it, Novdid!

              Kruzin, nice Avatar!
              There is no weakness, but to cringe and despair because one thinks oneself weak.
              For so long as one´s will is undefeated one is strong, for so long as the desire for revenge still endures.
              -Tom Holland, Deliver us from Evil

              Comment

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