groupProj. UProj. WSCorr. UCorr. WS BLLCMPos. angler MU MP

9147 45 309 23 158 5.53 359.79 -14.67 95.92 0.2550 1838.9 722.8


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SOHO MDI 2000-09-01 20:47:31 UT

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spotProj. UProj. WSCorr. UCorr. WSBLLCMPos. angler MU MP

1 24 282 12 144 5.48 0.38 -14.08 96.28 0.2448 2069.4 734.9
2 21 -1 11 -1 5.23 359.98 -14.48 97.04 0.2521 1671.4 999999
3 -2 -1 -2 -1 5.42 359.69 -14.77 96.15 0.2565 999999 999999
4 0 5 0 2 0.99 358.00 -16.46 110.04 0.3029 494.0 377.5
5 0 6 0 3 5.12 357.73 -16.73 96.26 0.2898 861.0 777.8
6 0 5 0 3 8.31 356.04 -18.43 85.36 0.3152 683.0 630.8
7 0 11 0 6 8.72 355.34 -19.12 84.19 0.3269 696.0 565.7


  • Proj. U -  Projected umbra area in millionths of solar disc, negative values indicate
    that the umbra consists of fragmented regions which cannot be separated without losing umbral area.
    In this way several spots (intensity minima in the umbra) have a common umbra, e.g. -2 means that
    the given spot shares an umbra with spot No.2, and the common U value is indicated at spot No.2.
  • Proj. WS -  Projected whole spot area in millionths of solar disc, negative values indicate
    that several umbras have a common penumbra, e.g. -7 means that the given umbra shares
    a penumbra with umbra No.7, and the WS value is indicated at No.7.
  • Corr. U -  Corrected umbra area in millionths of solar hemisphere, for negative values see above
  • Corr. WS -  Corrected whole spot area in millionths of solar hemisphere, for negative values see above
  • B -  Heliographic latitude B; positive: North, negative: South
  • L -  Heliographic longitude L
  • LCM -  Longitudinal distance from the Sun's central meridian
  • Pos. angle -  Position angle
  • r -  Distance from the centre of Sun's disc in terms of Sun's radius
  • MU -  Mean magnetic field within the umbra contour averaged the pixel values with sign.
  • MP -  Mean magnetic field within the penumbra contour averaged the pixel values with sign.