diskProj. UProj. WFCorr. UCorr. WF BLLCMPos. angler MU MP

1998 0.00 2300.94 0.00 3336.51 -10.61 68.21 -45.48 119.04 0.9250 -19.0 -3.3


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SOHO MDI 1998-03-09 12:47:33 UT




faculaeProj. UProj. WFCorr. UCorr. WFBLLCMPos. angler MU MP

1 0.00 3.21 0.00 6.47 0.73 189.28 75.59 272.60 0.9706 48.0 35.7
2 0.00 4.52 0.00 8.21 14.52 185.25 71.56 287.36 0.9634 26.0 -16.1
3 0.00 2.77 0.00 4.35 15.95 182.17 68.48 289.50 0.9504 20.0 50.9
4 0.00 4.66 0.00 6.13 11.22 179.33 65.64 285.26 0.9279 -38.0 -25.5
5 0.00 6.99 0.00 9.54 12.89 179.85 66.16 286.90 0.9334 109.0 21.6
6 0.00 4.81 0.00 6.38 12.27 179.33 65.65 286.36 0.9294 85.0 53.1
7 0.00 3.21 0.00 4.07 -16.55 181.80 68.11 255.04 0.9224 -56.0 -2.6
8 0.00 9.62 0.00 18.11 -24.91 190.18 76.49 246.08 0.9660 19.0 -9.9
9 0.00 4.81 0.00 4.92 1.43 174.28 60.59 275.66 0.8771 80.0 47.8
10 0.00 8.60 0.00 8.48 -3.73 173.75 60.06 269.86 0.8668 -45.0 -46.9
11 0.00 5.97 0.00 7.10 15.90 175.48 61.79 291.21 0.9108 77.0 34.8
12 0.00 7.14 0.00 8.98 18.32 176.29 62.61 293.51 0.9209 -69.0 -20.4
13 0.00 6.56 0.00 7.08 -22.86 177.05 63.36 247.96 0.8906 94.0 62.4
14 0.00 6.26 0.00 5.85 -16.51 172.33 58.64 255.00 0.8497 72.0 53.1
15 0.00 5.83 0.00 7.07 -26.90 180.30 66.61 243.70 0.9147 7.0 13.0
16 0.00 4.95 0.00 7.53 -31.34 185.78 72.09 239.28 0.9469 -58.0 -50.6
17 0.00 3.64 0.00 4.42 22.30 173.90 60.21 298.40 0.9146 -52.0 -24.7
18 0.00 7.28 0.00 8.98 -31.38 180.27 66.58 238.82 0.9174 63.0 34.1
19 0.00 4.66 0.00 4.18 13.73 166.52 52.83 291.76 0.8357 -19.0 -41.2
20 0.00 10.34 0.00 8.99 14.94 164.77 51.08 293.82 0.8240 -131.0 -47.2
21 0.00 13.70 0.00 13.70 -31.07 173.26 59.57 238.21 0.8708 -149.0 -42.2
22 0.00 3.21 0.00 3.38 -32.72 174.88 61.20 236.64 0.8846 84.0 81.2
23 0.00 4.66 0.00 3.97 -25.28 167.61 53.92 243.97 0.8155 86.0 53.8
24 0.00 2.77 0.00 1.90 -4.50 157.74 44.06 271.00 0.6957 90.0 67.4
25 0.00 5.10 0.00 8.56 39.29 174.50 60.82 315.00 0.9568 87.0 39.3
26 0.00 6.41 0.00 4.42 5.77 155.88 42.20 286.04 0.6977 85.0 51.9
27 0.00 3.21 0.00 3.40 -39.84 173.19 59.50 228.44 0.8862 -103.0 -60.1
28 0.00 6.70 0.00 11.57 41.08 174.09 60.40 316.82 0.9592 -13.0 9.9
29 0.00 4.23 0.00 2.71 -1.07 152.72 39.03 277.14 0.6369 88.0 64.2
30 0.00 4.37 0.00 4.19 31.53 160.13 46.44 313.81 0.8580 0.0 50.2
31 0.00 4.37 0.00 4.55 -44.10 170.68 56.99 223.20 0.8817 -74.0 -73.7
32 0.00 3.64 0.00 2.29 4.38 150.01 36.32 286.65 0.6187 111.0 100.6
33 0.00 3.93 0.00 2.97 23.63 152.70 39.02 310.17 0.7572 8.0 -57.3
34 0.00 4.23 0.00 4.00 36.96 154.71 41.03 322.04 0.8547 4.0 23.7
35 0.00 6.99 0.00 4.10 -17.32 145.28 31.59 248.86 0.5383 32.0 38.8
36 0.00 6.12 0.00 9.58 -58.43 179.90 66.21 210.33 0.9500 -89.0 -46.1
37 0.00 6.85 0.00 4.02 14.75 137.93 24.24 312.45 0.5402 -18.0 8.5
38 0.00 4.66 0.00 6.33 -62.13 170.49 56.80 204.84 0.9327 -4.0 -26.9
39 0.00 15.88 0.00 11.63 32.87 140.36 26.68 329.20 0.7388 -75.0 -68.1
40 0.00 4.95 0.00 6.68 -62.91 169.26 55.58 203.82 0.9318 -14.0 -19.3
41 0.00 5.10 0.00 7.07 -66.63 165.73 52.04 199.57 0.9356 -85.0 -27.4
42 0.00 11.51 0.00 7.26 25.83 133.53 19.84 330.44 0.6214 207.0 175.8
43 0.00 4.66 0.00 3.17 31.47 134.05 20.36 334.36 0.6881 90.0 71.2
44 0.00 5.10 0.00 6.96 -68.23 161.69 48.00 197.21 0.9335 -46.0 -48.5
45 0.00 4.08 0.00 3.91 -60.42 147.41 33.72 198.67 0.8584 -116.0 -56.9
46 0.00 3.79 0.00 6.41 -71.14 170.86 57.17 196.51 0.9576 -72.0 -52.9
47 0.00 6.56 0.00 11.07 61.49 145.19 31.50 344.88 0.9573 29.0 21.8
48 0.00 6.56 0.00 16.55 -75.20 186.50 72.81 194.42 0.9815 10.0 -11.3
49 0.00 3.64 0.00 3.72 -63.62 146.04 32.35 195.77 0.8767 -80.0 -57.0
50 0.00 4.37 0.00 5.89 -70.04 156.29 42.60 194.38 0.9317 -86.0 -21.7
51 0.00 5.83 0.00 6.62 -66.75 148.77 35.09 194.60 0.9019 -67.0 -32.3
52 0.00 5.54 0.00 7.10 57.63 135.78 22.09 347.39 0.9241 87.0 42.4
53 0.00 3.06 0.00 4.03 -71.16 150.14 36.45 191.95 0.9281 -11.0 -50.6
54 0.00 8.60 0.00 13.61 -74.32 157.95 44.26 191.45 0.9512 -11.0 1.2
55 0.00 4.37 0.00 3.09 36.56 126.85 13.16 345.14 0.7153 -64.0 -73.0
56 0.00 3.79 0.00 3.62 -63.47 137.21 23.52 192.03 0.8571 -47.0 -65.9
57 0.00 6.70 0.00 4.70 -50.44 128.92 15.23 193.67 0.7102 -69.0 -110.7
58 0.00 4.81 0.00 3.44 37.86 124.92 11.24 347.71 0.7249 -110.0 -81.6
59 0.00 6.70 0.00 5.54 -58.83 130.21 16.52 190.60 0.8026 -98.0 -26.8
60 0.00 5.10 0.00 6.51 -72.27 141.03 27.34 188.73 0.9234 -51.0 -26.4
61 0.00 4.66 0.00 3.70 -57.62 126.88 13.19 188.99 0.7843 -71.0 -69.2
62 0.00 5.10 0.00 13.91 -82.68 176.83 63.14 186.64 0.9842 -51.0 -3.6
63 0.00 8.45 0.00 13.55 -78.08 138.46 24.77 185.22 0.9525 -60.0 -31.2
64 0.00 5.68 0.00 4.37 42.43 119.62 5.93 354.28 0.7676 -223.0 -132.7
65 0.00 3.06 0.00 3.85 -73.44 128.40 14.71 184.51 0.9209 -52.0 -60.8
66 0.00 3.79 0.00 2.64 37.40 118.22 4.53 354.89 0.7071 -60.0 -105.3
67 0.00 6.85 0.00 8.28 -72.77 123.15 9.47 183.06 0.9140 -97.0 -41.9
68 0.00 15.01 0.00 9.90 34.00 116.82 3.13 356.07 0.6625 -17.0 -42.6
69 0.00 14.13 0.00 16.21 -71.52 119.82 6.13 182.15 0.9038 -19.0 -64.6
70 0.00 5.68 0.00 6.59 57.49 115.28 1.59 359.05 0.9060 -22.0 -26.8
71 0.00 4.37 0.00 6.06 61.87 114.27 0.59 359.70 0.9357 48.0 38.5
72 0.00 7.58 0.00 13.78 -81.40 114.24 0.55 180.09 0.9634 0.0 -13.6
73 0.00 3.93 0.00 5.72 62.88 113.11 -0.58 0.28 0.9417 51.0 27.3
74 0.00 6.26 0.00 8.37 -75.43 112.02 -1.67 179.55 0.9303 -29.0 -36.8
75 0.00 5.68 0.00 17.55 -87.94 101.93 -11.76 179.57 0.9878 -31.0 -18.2
76 0.00 7.28 0.00 13.62 -81.83 109.64 -4.05 179.40 0.9655 -35.0 -25.4
77 0.00 3.21 0.00 3.22 -67.66 110.14 -3.55 178.45 0.8724 -125.0 -91.3
78 0.00 3.06 0.00 2.26 -54.97 110.60 -3.09 177.61 0.7435 -26.0 -102.1
79 0.00 8.30 0.00 9.90 -72.52 106.86 -6.82 177.75 0.9113 -169.0 -90.8
80 0.00 6.26 0.00 9.49 -77.94 103.66 -10.03 177.79 0.9465 -25.0 -27.8
81 0.00 3.93 0.00 3.10 -58.10 107.40 -6.29 175.73 0.7809 -101.0 -72.6
82 0.00 3.50 0.00 3.97 -70.66 98.94 -14.75 174.62 0.9018 -4.0 -30.0
83 0.00 6.26 0.00 8.35 60.45 103.04 -10.64 5.63 0.9300 77.0 47.1
84 0.00 3.35 0.00 8.06 -82.50 62.76 -50.93 174.06 0.9795 58.0 39.3
85 0.00 2.33 0.00 2.78 -71.62 94.58 -19.11 173.49 0.9118 -68.0 -40.8
86 0.00 4.66 0.00 4.85 -67.78 97.54 -16.15 173.13 0.8811 -90.0 -41.3
87 0.00 4.37 0.00 3.75 46.84 103.87 -9.82 8.21 0.8189 -72.0 -47.5
88 0.00 13.70 0.00 22.45 -77.49 80.42 -33.27 172.84 0.9546 -61.0 -22.2
89 0.00 5.10 0.00 4.37 46.73 103.32 -10.37 8.69 0.8185 -44.0 -47.0
90 0.00 5.54 0.00 5.40 -65.24 95.00 -18.69 171.04 0.8637 -44.0 -38.7
91 0.00 2.62 0.00 2.62 -65.96 94.05 -19.64 170.93 0.8708 -107.0 -74.6
92 0.00 9.03 0.00 6.98 41.95 102.72 -10.97 10.62 0.7702 -138.0 -157.0
93 0.00 10.20 0.00 20.83 -79.25 63.85 -49.84 171.55 0.9712 -4.0 -23.7
94 0.00 10.93 0.00 6.43 -38.30 102.81 -10.88 164.05 0.5411 86.0 54.7
95 0.00 5.10 0.00 6.02 -69.32 83.27 -30.42 168.64 0.9095 -46.0 -41.0
96 0.00 3.50 0.00 4.41 -70.45 79.45 -34.24 168.18 0.9214 -79.0 -74.2
97 0.00 11.95 0.00 20.90 63.58 87.29 -26.40 11.91 0.9604 41.0 25.8
98 0.00 5.24 0.00 10.57 -75.64 53.99 -59.70 167.24 0.9705 -28.0 12.1
99 0.00 4.66 0.00 5.54 -67.89 77.27 -36.42 165.77 0.9108 -57.0 -29.7
100 0.00 4.81 0.00 2.51 -19.04 99.38 -14.31 131.79 0.3147 -125.0 -73.3
101 0.00 4.37 0.00 2.26 -15.54 99.16 -14.53 121.63 0.2851 -107.0 -102.9
102 0.00 3.21 0.00 2.90 45.51 89.90 -23.78 19.73 0.8395 -128.0 -109.6
103 0.00 6.99 0.00 5.69 -54.28 84.74 -28.95 159.14 0.7957 -127.0 -71.1
104 0.00 3.50 0.00 3.71 -62.75 75.12 -38.57 161.17 0.8864 -102.0 -60.6
105 0.00 6.26 0.00 5.76 45.92 89.35 -24.34 19.90 0.8447 -163.0 -93.8
106 0.00 3.35 0.00 2.57 38.44 92.23 -21.46 22.03 0.7663 -38.0 -57.8
107 0.00 5.97 0.00 9.32 -67.80 56.17 -57.51 160.36 0.9497 -40.0 -8.3
108 0.00 3.50 0.00 3.30 45.52 85.79 -27.90 22.66 0.8533 -63.0 -74.2
109 0.00 3.93 0.00 6.46 -67.81 53.34 -60.35 159.86 0.9548 -72.0 -33.3
110 0.00 9.76 0.00 5.49 -26.03 91.63 -22.06 134.43 0.4745 -32.0 -59.3
111 0.00 4.08 0.00 12.86 -69.16 30.18 -83.51 159.03 0.9883 24.0 -1.5
112 0.00 6.70 0.00 14.98 -65.81 38.96 -74.73 156.09 0.9762 -18.0 -2.1
113 0.00 5.83 0.00 5.01 38.94 81.81 -31.88 30.18 0.8194 49.0 43.1
114 0.00 5.10 0.00 6.75 50.15 71.44 -42.25 27.68 0.9290 7.0 -7.8
115 0.00 8.16 0.00 9.22 46.66 74.75 -38.94 28.68 0.9007 121.0 46.5
116 0.00 29.58 0.00 36.95 48.90 72.52 -41.17 28.12 0.9198 217.0 90.8
117 0.00 9.03 0.00 10.99 48.08 72.70 -40.98 28.66 0.9152 59.0 55.0
118 0.00 10.05 0.00 13.15 49.45 70.99 -42.70 28.45 0.9272 29.0 0.4
119 0.00 7.58 0.00 8.73 46.70 73.69 -39.99 29.22 0.9047 -60.0 -125.1
120 0.00 5.97 0.00 7.59 48.68 71.32 -42.37 28.89 0.9226 59.0 29.8
121 0.00 3.06 0.00 3.62 47.16 72.82 -40.87 29.32 0.9102 -101.0 -81.3
122 0.00 5.97 0.00 5.94 42.28 76.22 -37.47 31.27 0.8691 63.0 66.9
123 0.00 182.12 0.00 218.02 46.99 72.00 -41.68 29.89 0.9122 97.0 48.3
124 0.00 5.68 0.00 7.93 -57.99 51.86 -61.83 150.01 0.9366 -34.0 -24.7
125 0.00 5.83 0.00 4.14 26.73 81.94 -31.74 40.95 0.7193 -79.0 -88.9
126 0.00 10.64 0.00 11.15 -51.99 61.38 -52.31 146.44 0.8834 -24.0 -29.6
127 0.00 28.99 0.00 33.17 43.99 70.46 -43.23 33.14 0.9033 -106.0 -74.6
128 0.00 126.61 0.00 173.34 47.67 66.55 -47.14 31.97 0.9339 -145.0 -59.2
129 0.00 9.76 0.00 10.37 42.03 72.00 -41.69 33.95 0.8865 -89.0 -61.5
130 0.00 36.13 0.00 46.59 46.30 67.53 -46.16 32.66 0.9250 -129.0 -82.1
131 0.00 4.08 0.00 3.11 -40.37 72.57 -41.12 138.72 0.7617 -35.0 -46.8
132 0.00 20.83 0.00 16.67 -42.22 70.39 -43.29 139.71 0.7876 -155.0 -122.7
133 0.00 6.99 0.00 9.00 45.68 66.91 -46.78 33.48 0.9246 -15.0 -61.8
134 0.00 4.23 0.00 5.09 44.11 68.08 -45.61 34.25 0.9134 -75.0 -49.1
135 0.00 12.38 0.00 9.30 -38.47 72.15 -41.54 136.31 0.7541 -179.0 -120.4
136 0.00 5.97 0.00 4.71 -40.86 70.32 -43.37 138.17 0.7809 -90.0 -158.4
137 0.00 3.79 0.00 3.23 -43.84 67.31 -46.38 140.12 0.8165 -177.0 -103.2
138 0.00 24.33 0.00 30.26 44.19 66.75 -46.94 34.83 0.9190 -149.0 -64.6
139 0.00 3.64 0.00 2.29 -24.90 78.37 -35.31 121.79 0.6191 221.0 209.3
140 0.00 16.17 0.00 24.48 47.42 62.38 -51.31 33.98 0.9464 -86.0 -49.1
141 0.00 3.64 0.00 3.06 -42.87 67.58 -46.11 139.17 0.8101 34.0 -27.1
142 0.00 3.35 0.00 2.85 -43.28 67.10 -46.59 139.41 0.8151 -8.0 -50.4
143 0.00 2.04 0.00 1.74 -43.01 66.83 -46.86 139.01 0.8157 -118.0 -91.9
144 0.00 2.33 0.00 1.85 -40.17 69.41 -44.28 136.96 0.7840 -224.0 -320.5
145 0.00 7.14 0.00 5.51 -38.75 70.46 -43.23 135.83 0.7688 -195.0 -169.1
146 0.00 10.78 0.00 9.34 -43.49 66.10 -47.59 139.24 0.8226 -139.0 -131.0
147 0.00 4.66 0.00 5.69 43.00 66.32 -47.37 36.07 0.9157 -71.0 -44.8
148 0.00 6.12 0.00 3.91 -25.23 77.16 -36.53 121.63 0.6347 32.0 50.6
149 0.00 9.32 0.00 9.75 39.13 69.58 -44.11 37.81 0.8828 -23.0 -36.9
150 0.00 5.68 0.00 9.94 48.48 58.67 -55.02 34.49 0.9604 -77.0 -36.1
151 0.00 27.83 0.00 21.87 -39.04 69.34 -44.34 135.64 0.7788 -277.0 -215.6
152 0.00 8.16 0.00 6.66 -40.02 67.52 -46.16 135.97 0.7971 13.0 68.8
153 0.00 6.56 0.00 5.29 -39.43 67.88 -45.80 135.46 0.7917 125.0 132.0
154 0.00 3.50 0.00 7.77 49.99 53.69 -59.99 34.83 0.9759 -17.0 -20.2
155 0.00 3.06 0.00 4.92 -53.39 44.19 -69.50 144.05 0.9528 0.0 15.2
156 0.00 5.39 0.00 4.36 -39.07 67.47 -46.21 134.87 0.7931 116.0 136.5
157 0.00 11.95 0.00 10.60 -42.37 63.93 -49.76 137.18 0.8320 -38.0 -68.2
158 0.00 5.10 0.00 4.43 -41.40 64.62 -49.07 136.37 0.8235 169.0 213.8
159 0.00 3.21 0.00 2.74 -40.82 65.13 -48.56 135.91 0.8176 148.0 117.0
160 0.00 4.81 0.00 8.32 46.68 57.38 -56.30 36.57 0.9594 -63.0 -26.3
161 0.00 1.17 0.00 1.00 -40.60 64.87 -48.81 135.57 0.8185 195.0 197.0
162 0.00 15.15 0.00 13.38 -40.91 63.38 -50.30 135.37 0.8300 260.0 171.9
163 0.00 2.77 0.00 3.55 -48.12 49.90 -63.79 139.52 0.9242 8.0 40.6
164 0.00 198.14 0.00 192.90 -42.26 59.00 -54.69 135.45 0.8630 200.0 169.8
165 0.00 7.43 0.00 6.04 -35.67 65.41 -48.28 130.10 0.7951 73.0 57.0
166 0.00 4.95 0.00 3.55 12.85 71.72 -41.97 64.46 0.7250 -142.0 -112.6
167 0.00 9.32 0.00 10.27 -41.19 53.12 -60.57 132.80 0.8952 28.0 42.8
168 0.00 3.64 0.00 3.86 -39.09 53.97 -59.72 130.70 0.8860 52.0 58.7
169 0.00 4.37 0.00 3.02 -13.94 69.08 -44.61 102.60 0.7008 85.0 69.0
170 0.00 4.37 0.00 3.47 17.29 67.94 -45.75 61.04 0.7839 52.0 30.8
171 0.00 3.50 0.00 5.21 -42.40 43.44 -70.24 132.54 0.9447 11.0 19.8
172 0.00 3.79 0.00 3.61 25.36 63.41 -50.28 54.41 0.8568 -82.0 -68.1
173 0.00 7.43 0.00 10.72 35.08 54.47 -59.22 48.47 0.9407 40.0 23.8
174 0.00 28.85 0.00 21.75 5.29 66.28 -47.41 76.50 0.7562 -269.0 -123.5
175 0.00 5.10 0.00 3.98 -14.02 62.56 -51.13 102.24 0.7753 -97.0 -55.8
176 0.00 5.54 0.00 5.19 17.98 60.60 -53.08 63.58 0.8513 -66.0 -40.5
177 0.00 13.55 0.00 18.31 28.51 52.97 -60.72 55.47 0.9320 56.0 33.3
178 0.00 7.14 0.00 5.65 1.33 63.05 -50.64 82.45 0.7820 114.0 89.7
179 0.00 16.46 0.00 13.33 -13.57 60.82 -52.87 101.61 0.7935 0.0 -10.9
180 0.00 15.59 0.00 26.21 29.86 48.21 -65.48 55.66 0.9569 -40.0 -21.2
181 0.00 11.95 0.00 21.79 29.39 46.36 -67.33 56.65 0.9636 -25.0 -10.8
182 0.00 4.81 0.00 11.91 -34.30 32.76 -80.93 123.64 0.9807 -39.0 -9.7
183 0.00 10.93 0.00 10.73 7.02 55.56 -58.13 77.50 0.8654 129.0 55.7
184 0.00 9.03 0.00 13.49 21.50 47.84 -65.85 64.15 0.9449 44.0 19.3
185 0.00 10.34 0.00 10.69 -15.97 51.49 -62.20 104.30 0.8796 0.0 -23.2
186 0.00 6.41 0.00 22.53 -29.42 28.95 -84.73 118.83 0.9907 35.0 68.0
187 0.00 5.83 0.00 6.08 -11.55 51.24 -62.45 99.27 0.8821 -74.0 -48.5
188 0.00 5.24 0.00 29.61 -28.90 25.48 -88.21 118.55 0.9965 111.0 50.1
189 0.00 3.21 0.00 10.56 -27.75 29.69 -83.99 117.09 0.9893 70.0 34.0
190 0.00 3.06 0.00 5.52 -24.53 37.96 -75.73 113.52 0.9628 -48.0 -51.5
191 0.00 2.77 0.00 2.95 -6.31 50.95 -62.74 93.37 0.8870 45.0 45.0
192 0.00 268.51 0.00 676.93 -26.00 32.82 -80.87 115.17 0.9814 -14.0 -19.7
193 0.00 6.26 0.00 30.73 -26.75 26.57 -87.12 116.31 0.9954 49.0 26.0
194 0.00 13.40 0.00 23.49 -22.71 38.52 -75.17 111.62 0.9605 -81.0 -64.4
195 0.00 5.24 0.00 24.82 -25.75 26.91 -86.78 115.28 0.9950 -42.0 -14.0
196 0.00 123.84 0.00 248.73 -21.40 36.25 -77.44 110.32 0.9702 -66.0 -33.6
197 0.00 4.52 0.00 13.94 -23.56 30.65 -83.03 112.81 0.9878 -25.0 40.3
198 0.00 56.24 0.00 159.85 -22.38 31.61 -82.07 111.55 0.9855 -4.0 34.7
199 0.00 1.75 0.00 4.11 -20.79 34.00 -79.69 109.80 0.9785 -4.0 26.3
200 0.00 3.79 0.00 8.43 5.75 37.46 -76.22 82.39 0.9760 -11.0 22.8


  • Proj. U -  Projected umbra area in millionths of solar disc, it is zero for faculae
  • Proj. WF -  Projected facular area in millionths of solar disc
  • Corr. U -  Corrected umbra area in millionths of solar hemisphere, it is zero for faculae
  • Corr. WF -  Corrected facular area in millionths of solar hemisphere
  • 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 -  Magnetic field of the pixel of the center of gravity of facular contour.
  • MP -  Mean magnetic field within the facular contour averaged the pixel values with sign.