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

8970 250 1705 241 1664 -13.74 263.44 -59.73 103.03 0.8614


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SOHO MDI 2000-04-22 15:59:33 UT

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spotProj. UProj. WSCorr. UCorr. WSBLLCMPos. angler

1 92 1221 82 1113 -13.19 267.22 -55.95 102.57 0.8287
2 4 -1 3 -1 -13.83 266.77 -56.40 103.32 0.8333
3 4 -1 3 -1 -12.24 266.82 -56.35 101.41 0.8321
4 -1 -1 -1 -1 -13.00 266.34 -56.83 102.30 0.8369
5 41 -1 37 -1 -13.72 265.77 -57.39 103.12 0.8424
6 0 6 0 5 -9.90 266.71 -56.45 98.58 0.8325
7 10 -1 9 -1 -13.52 264.71 -58.46 102.83 0.8520
8 12 -1 11 -1 -13.04 264.66 -58.51 102.26 0.8522
9 9 -1 9 -1 -14.13 262.62 -60.55 103.43 0.8702
10 0 3 0 3 -11.30 263.65 -59.52 100.19 0.8607
11 10 43 10 45 -16.29 261.37 -61.80 105.84 0.8812
12 4 36 4 37 -14.91 261.75 -61.42 104.28 0.8777
13 9 -1 9 -1 -13.12 262.48 -60.69 102.27 0.8711
14 5 34 5 37 -16.19 260.01 -63.16 105.65 0.8918
15 5 -14 5 -14 -15.75 260.16 -63.01 105.17 0.8904
16 0 7 0 9 -17.31 257.28 -65.89 106.77 0.9119
17 2 30 3 33 -13.20 259.31 -63.86 102.28 0.8963
18 10 325 11 382 -14.44 258.29 -64.88 103.64 0.9040
19 26 -18 31 -18 -14.50 257.48 -65.69 103.68 0.9099
20 7 -18 9 -18 -13.86 257.54 -65.63 102.98 0.9093


  • 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