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

8844 111 639 113 650 4.52 72.04 60.01 278.44 0.8732 -108.4 -33.0


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SOHO MDI 2000-01-28 00:59:32 UT

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

1 23 160 28 192 4.22 77.34 65.31 277.18 0.9151 393.2 95.5
2 -1 -1 -1 -1 4.08 76.68 64.65 277.13 0.9102 999999 999999
3 2 59 2 64 3.39 75.09 63.06 276.63 0.8978 435.1 589.5
4 0 3 0 3 2.99 74.96 62.93 276.21 0.8964 341.0 395.7
5 10 -3 10 -3 3.84 74.05 62.02 277.30 0.8903 914.9 999999
6 3 -3 3 -3 4.30 73.95 61.92 277.82 0.8900 613.5 999999
7 2 -3 2 -3 4.50 73.57 61.54 278.11 0.8872 570.1 999999
8 0 3 0 3 4.01 72.86 60.83 277.68 0.8809 427.0 404.7
9 2 35 2 36 4.53 72.61 60.58 278.31 0.8795 776.3 583.0
10 12 -9 12 -9 4.91 72.51 60.48 278.76 0.8792 786.8 999999
11 0 3 0 3 5.39 71.73 59.70 279.44 0.8734 499.0 424.5
12 0 4 0 4 2.96 70.97 58.94 276.80 0.8636 -178.0 -164.0
13 11 372 10 345 3.33 69.89 57.86 277.42 0.8546 -611.1 -294.3
14 12 -13 11 -13 4.21 69.34 57.31 278.55 0.8509 -882.8 999999
15 6 -13 6 -13 4.76 68.83 56.80 279.28 0.8471 -996.2 999999
16 18 -13 17 -13 5.15 68.39 56.36 279.82 0.8437 -910.0 999999
17 10 -13 10 -13 6.44 67.96 55.93 281.42 0.8420 -1028.3 999999


  • 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.