group | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
22 | 111 | 22 | 114 | -18.01 | 163.06 | -61.38 | 107.06 | 0.8744 | 158.2 | 62.8 |
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back to the solar disc SOHO MDI 2000-04-02 20:47:33 UT |
spot | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
6 | 24 | 5 | 22 | -18.17 | 167.10 | -57.34 | 107.49 | 0.8408 | -860.9 | -614.7 | |
4 | 15 | 4 | 14 | -17.72 | 166.18 | -58.26 | 106.89 | 0.8488 | -441.2 | -287.4 | |
12 | 70 | 13 | 75 | -17.99 | 161.40 | -63.04 | 106.95 | 0.8882 | 732.2 | 321.0 | |
0 | 2 | 0 | 3 | -18.59 | 160.54 | -63.91 | 107.59 | 0.8948 | 319.0 | 210.8 |
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. |
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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. |
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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. |