SDO HMI 2014-09-09 18:00:35 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing)
(It is recommended to set high resolution on your display!)
| group | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 237.11 | 1058.25 | 127.51 | 570.81 | -13.92 | 96.37 | -8.87 | 158.11 | 0.3949 | -107.3 | -118.5 | |
|
previous
or next observation for the same group /
back to the solar disc SDO HMI 2014-09-09 18:00:35 UT
See sunspots with tool (Click here to study sunspot positions and configurations with tool using white-light and magnetogram images and polarity drawing) (It is recommended to set high resolution on your display!) |
| spot | Proj. U | Proj. WS | Corr. U | Corr. WS | B | L | LCM | Pos. angle | r | MU | MP |
| 0.00 | 1.43 | 0.00 | 0.76 | -13.66 | 105.36 | 0.12 | 180.32 | 0.3585 | 821.0 | 684.4 | |
| 5.61 | 68.95 | 2.95 | 36.22 | -12.28 | 104.59 | -0.65 | 178.09 | 0.3359 | 1292.7 | 460.9 | |
| 3.03 | -2.00 | 1.59 | -2.00 | -12.12 | 104.40 | -0.84 | 177.53 | 0.3334 | 1425.1 | 999999 | |
| 4.72 | -2.00 | 2.48 | -2.00 | -12.31 | 104.37 | -0.87 | 177.47 | 0.3366 | 1201.3 | 999999 | |
| 3.74 | -2.00 | 1.97 | -2.00 | -12.15 | 104.22 | -1.02 | 176.99 | 0.3340 | 1103.0 | 999999 | |
| 0.00 | 0.53 | 0.00 | 0.28 | -10.53 | 103.77 | -1.47 | 175.26 | 0.3076 | -344.0 | -438.0 | |
| 1.25 | 2.85 | 0.65 | 1.50 | -11.93 | 103.54 | -1.70 | 174.95 | 0.3311 | 1046.4 | 817.8 | |
| 0.00 | 0.98 | 0.00 | 0.52 | -12.99 | 102.94 | -2.30 | 173.56 | 0.3495 | 756.0 | 607.3 | |
| 12.92 | 104.40 | 6.77 | 54.69 | -11.71 | 102.93 | -2.31 | 173.06 | 0.3286 | 1234.9 | 595.2 | |
| 2.05 | -9.00 | 1.08 | -9.00 | -12.03 | 102.92 | -2.32 | 173.16 | 0.3338 | 960.0 | 999999 | |
| 8.64 | -9.00 | 4.52 | -9.00 | -11.49 | 102.84 | -2.41 | 172.70 | 0.3251 | 1297.2 | 999999 | |
| 4.45 | -9.00 | 2.34 | -9.00 | -12.22 | 102.83 | -2.41 | 172.96 | 0.3371 | 847.5 | 999999 | |
| 4.81 | -9.00 | 2.53 | -9.00 | -11.93 | 102.77 | -2.47 | 172.68 | 0.3326 | 1090.6 | 999999 | |
| 0.00 | 1.16 | 0.00 | 0.61 | -12.90 | 102.73 | -2.51 | 172.92 | 0.3484 | 605.0 | 569.5 | |
| 0.62 | -9.00 | 0.33 | -9.00 | -11.14 | 102.72 | -2.52 | 172.19 | 0.3196 | 1185.3 | 999999 | |
| 0.00 | 1.16 | 0.00 | 0.61 | -13.06 | 102.26 | -2.98 | 171.69 | 0.3520 | 829.0 | 683.5 | |
| 0.00 | 1.96 | 0.00 | 1.03 | -11.74 | 102.15 | -3.09 | 170.79 | 0.3309 | 716.0 | 653.4 | |
| 2.23 | 4.28 | 1.18 | 2.26 | -12.68 | 101.65 | -3.59 | 169.82 | 0.3475 | 1060.9 | 840.2 | |
| 0.00 | 1.43 | 0.00 | 0.75 | -11.75 | 101.66 | -3.58 | 169.35 | 0.3324 | 951.0 | 698.2 | |
| 0.00 | 1.34 | 0.00 | 0.71 | -14.07 | 101.28 | -3.96 | 169.55 | 0.3709 | 713.0 | 625.3 | |
| 0.00 | 0.89 | 0.00 | 0.49 | -17.22 | 100.99 | -4.25 | 170.30 | 0.4215 | -716.0 | -588.8 | |
| 0.00 | 1.87 | 0.00 | 0.98 | -11.53 | 101.08 | -4.16 | 167.52 | 0.3307 | 858.0 | 695.0 | |
| 3.39 | 4.90 | 1.79 | 2.59 | -12.49 | 101.00 | -4.24 | 167.92 | 0.3465 | 981.6 | 767.3 | |
| 0.00 | 0.89 | 0.00 | 0.47 | -12.78 | 100.78 | -4.46 | 167.49 | 0.3519 | 930.0 | 723.4 | |
| 0.53 | 2.94 | 0.28 | 1.56 | -12.97 | 100.65 | -4.59 | 167.26 | 0.3555 | 868.0 | 641.5 | |
| 6.06 | 13.63 | 3.18 | 7.14 | -11.31 | 100.62 | -4.62 | 166.03 | 0.3289 | 1126.5 | 692.0 | |
| 0.00 | 5.70 | 0.00 | 3.03 | -13.33 | 100.36 | -4.88 | 166.73 | 0.3622 | 972.0 | 770.3 | |
| 0.00 | 1.16 | 0.00 | 0.63 | -16.83 | 100.21 | -5.03 | 168.36 | 0.4177 | -888.0 | -702.3 | |
| 0.45 | 2.05 | 0.24 | 1.09 | -12.88 | 100.06 | -5.18 | 165.63 | 0.3563 | 910.8 | 740.3 | |
| 0.00 | 1.69 | 0.00 | 0.89 | -11.89 | 99.58 | -5.66 | 163.58 | 0.3427 | 661.0 | 504.2 | |
| 1.51 | 3.12 | 0.79 | 1.64 | -11.07 | 99.45 | -5.79 | 162.47 | 0.3303 | 884.8 | 701.8 | |
| 1.60 | 2.67 | 0.87 | 1.45 | -16.35 | 98.80 | -6.44 | 164.93 | 0.4155 | 796.1 | 629.7 | |
| 0.00 | 1.69 | 0.00 | 0.90 | -13.28 | 98.90 | -6.34 | 162.92 | 0.3677 | 732.0 | 440.6 | |
| 0.00 | 2.32 | 0.00 | 1.26 | -16.58 | 98.41 | -6.83 | 164.22 | 0.4207 | 785.0 | 661.8 | |
| 0.00 | 1.34 | 0.00 | 0.73 | -16.09 | 98.43 | -6.81 | 163.92 | 0.4131 | 878.0 | 743.5 | |
| 0.00 | 1.96 | 0.00 | 1.04 | -12.97 | 98.31 | -6.93 | 161.17 | 0.3657 | 460.0 | 374.6 | |
| 0.00 | 1.16 | 0.00 | 0.62 | -14.07 | 98.15 | -7.09 | 161.73 | 0.3835 | 894.0 | 702.8 | |
| 0.00 | 1.25 | 0.00 | 0.66 | -11.12 | 98.18 | -7.06 | 158.99 | 0.3379 | 773.0 | 533.2 | |
| 0.00 | 2.76 | 0.00 | 1.47 | -12.75 | 98.13 | -7.11 | 160.51 | 0.3633 | 351.0 | 66.1 | |
| 0.00 | 2.41 | 0.00 | 1.29 | -14.66 | 98.01 | -7.23 | 161.88 | 0.3932 | 673.0 | 561.0 | |
| 0.00 | 1.16 | 0.00 | 0.61 | -11.60 | 98.04 | -7.20 | 159.13 | 0.3461 | -630.0 | -506.2 | |
| 12.65 | 103.33 | 6.90 | 56.46 | -16.46 | 97.82 | -7.43 | 162.83 | 0.4215 | 1046.8 | 397.8 | |
| 2.32 | -42.00 | 1.26 | -42.00 | -15.97 | 97.83 | -7.41 | 162.50 | 0.4140 | 1062.0 | 999999 | |
| 0.00 | 2.67 | 0.00 | 1.41 | -11.18 | 97.93 | -7.31 | 158.39 | 0.3405 | 678.0 | 558.4 | |
| 0.45 | 39.91 | 0.24 | 21.22 | -13.07 | 97.81 | -7.43 | 160.01 | 0.3700 | -714.2 | -581.8 | |
| 1.60 | -45.00 | 0.85 | -45.00 | -12.95 | 97.69 | -7.55 | 159.59 | 0.3688 | -840.1 | 999999 | |
| 5.17 | -45.00 | 2.75 | -45.00 | -12.85 | 97.66 | -7.58 | 159.42 | 0.3675 | -717.7 | 999999 | |
| 0.00 | 0.45 | 0.00 | 0.24 | -13.79 | 97.63 | -7.61 | 160.23 | 0.3819 | 827.0 | 719.4 | |
| 12.83 | -45.00 | 6.82 | -45.00 | -12.56 | 97.61 | -7.63 | 159.00 | 0.3634 | -1191.8 | 999999 | |
| 0.00 | 1.60 | 0.00 | 0.86 | -14.37 | 97.55 | -7.69 | 160.55 | 0.3912 | 772.0 | 695.2 | |
| 6.06 | -42.00 | 3.30 | -42.00 | -16.14 | 97.42 | -7.82 | 161.71 | 0.4186 | 1171.5 | 999999 | |
| 1.60 | -42.00 | 0.88 | -42.00 | -16.60 | 97.30 | -7.94 | 161.82 | 0.4261 | 758.0 | 999999 | |
| 0.00 | 2.32 | 0.00 | 1.23 | -12.25 | 97.34 | -7.90 | 158.00 | 0.3602 | 656.0 | 313.5 | |
| 0.00 | 0.98 | 0.00 | 0.53 | -14.31 | 97.23 | -8.01 | 159.77 | 0.3920 | 822.0 | 644.1 | |
| 2.14 | -42.00 | 1.17 | -42.00 | -16.41 | 97.09 | -8.15 | 161.21 | 0.4243 | 778.2 | 999999 | |
| 0.71 | 2.94 | 0.38 | 1.58 | -14.35 | 97.01 | -8.23 | 159.29 | 0.3938 | 969.8 | 727.0 | |
| 0.00 | 1.25 | 0.00 | 0.68 | -15.36 | 96.97 | -8.27 | 160.10 | 0.4092 | 853.0 | 644.5 | |
| 0.00 | 1.16 | 0.00 | 0.62 | -12.25 | 96.96 | -8.28 | 157.07 | 0.3626 | -655.0 | -525.7 | |
| 0.00 | 1.07 | 0.00 | 0.58 | -14.16 | 96.67 | -8.57 | 158.34 | 0.3929 | 826.0 | 621.1 | |
| 0.00 | 1.07 | 0.00 | 0.58 | -15.40 | 96.50 | -8.74 | 159.09 | 0.4124 | 847.0 | 787.6 | |
| 0.00 | 1.78 | 0.00 | 0.96 | -14.42 | 96.54 | -8.70 | 158.28 | 0.3976 | 783.0 | 633.8 | |
| 0.00 | 1.51 | 0.00 | 0.81 | -12.71 | 96.48 | -8.76 | 156.38 | 0.3726 | -674.0 | -603.5 | |
| 0.00 | 3.47 | 0.00 | 1.89 | -15.50 | 96.27 | -8.97 | 158.69 | 0.4152 | 880.0 | 779.6 | |
| 0.00 | 1.96 | 0.00 | 1.04 | -12.36 | 96.37 | -8.88 | 155.72 | 0.3681 | -1061.0 | -857.5 | |
| 0.00 | 1.43 | 0.00 | 0.77 | -13.81 | 96.12 | -9.12 | 156.73 | 0.3912 | -186.0 | -109.7 | |
| 0.00 | 1.07 | 0.00 | 0.58 | -14.85 | 96.05 | -9.19 | 157.60 | 0.4070 | 656.0 | 462.5 | |
| 0.00 | 0.89 | 0.00 | 0.47 | -12.24 | 96.12 | -9.12 | 154.98 | 0.3679 | -930.0 | -835.7 | |
| 2.58 | 11.67 | 1.40 | 6.31 | -14.37 | 95.97 | -9.27 | 156.95 | 0.4003 | 895.3 | 484.6 | |
| 0.00 | 1.25 | 0.00 | 0.67 | -12.43 | 95.99 | -9.25 | 154.89 | 0.3717 | -924.0 | -724.7 | |
| 1.96 | -68.00 | 1.06 | -68.00 | -14.60 | 95.77 | -9.47 | 156.75 | 0.4049 | 722.2 | 999999 | |
| 0.00 | 6.77 | 0.00 | 3.70 | -15.81 | 95.65 | -9.59 | 157.66 | 0.4234 | 615.0 | 684.4 | |
| 0.00 | 0.98 | 0.00 | 0.52 | -12.24 | 95.74 | -9.50 | 154.09 | 0.3706 | -1051.0 | -865.8 | |
| 0.00 | 1.51 | 0.00 | 0.81 | -11.96 | 95.72 | -9.52 | 153.70 | 0.3666 | -978.0 | -752.2 | |
| 0.00 | 1.78 | 0.00 | 0.96 | -13.53 | 95.57 | -9.67 | 155.17 | 0.3907 | -242.0 | -222.6 | |
| 1.60 | 2.94 | 0.89 | 1.63 | -17.57 | 95.33 | -9.91 | 158.57 | 0.4508 | -935.4 | -788.7 | |
| 0.00 | 2.23 | 0.00 | 1.23 | -17.34 | 95.32 | -9.92 | 158.34 | 0.4475 | -936.0 | -864.2 | |
| 0.00 | 4.99 | 0.00 | 2.69 | -13.73 | 95.40 | -9.84 | 155.01 | 0.3947 | -645.0 | -542.7 | |
| 0.45 | 6.41 | 0.24 | 3.42 | -12.25 | 95.43 | -9.81 | 153.36 | 0.3730 | -923.6 | -856.8 | |
| 0.00 | 2.32 | 0.00 | 1.25 | -13.51 | 95.38 | -9.86 | 154.71 | 0.3915 | -622.0 | -569.7 | |
| 2.23 | 495.55 | 1.21 | 269.44 | -14.64 | 95.30 | -9.94 | 155.75 | 0.4086 | 831.4 | -396.0 | |
| 0.00 | 2.49 | 0.00 | 1.38 | -17.14 | 95.13 | -10.11 | 157.81 | 0.4458 | -799.0 | -785.2 | |
| 0.00 | 0.98 | 0.00 | 0.54 | -16.94 | 95.15 | -10.10 | 157.65 | 0.4428 | -807.0 | -670.7 | |
| 0.00 | 3.65 | 0.00 | 1.96 | -13.19 | 95.20 | -10.04 | 153.96 | 0.3881 | -939.0 | -808.0 | |
| 5.43 | -80.00 | 2.95 | -80.00 | -14.78 | 95.04 | -10.21 | 155.34 | 0.4123 | 734.0 | 999999 | |
| 0.00 | 0.71 | 0.00 | 0.39 | -16.49 | 94.88 | -10.36 | 156.71 | 0.4378 | 240.0 | 292.8 | |
| 0.00 | 1.34 | 0.00 | 0.72 | -12.81 | 95.03 | -10.21 | 153.12 | 0.3839 | -946.0 | -803.1 | |
| 0.00 | 1.07 | 0.00 | 0.57 | -12.65 | 95.01 | -10.23 | 152.87 | 0.3818 | -966.0 | -741.2 | |
| 0.00 | 1.07 | 0.00 | 0.57 | -12.65 | 94.85 | -10.39 | 152.51 | 0.3830 | -905.0 | -774.7 | |
| 1.96 | -80.00 | 1.06 | -80.00 | -13.36 | 94.72 | -10.52 | 153.09 | 0.3940 | -1107.1 | 999999 | |
| 0.00 | 2.67 | 0.00 | 1.47 | -16.20 | 94.58 | -10.66 | 155.82 | 0.4356 | 709.0 | 531.5 | |
| 0.00 | 1.07 | 0.00 | 0.56 | -7.84 | 94.86 | -10.38 | 145.34 | 0.3153 | -808.0 | -645.3 | |
| 0.00 | 1.34 | 0.00 | 0.73 | -15.91 | 94.28 | -10.97 | 154.93 | 0.4335 | 686.0 | 528.6 | |
| 7.84 | -80.00 | 4.23 | -80.00 | -13.50 | 94.27 | -10.97 | 152.28 | 0.3993 | -1356.8 | 999999 | |
| 0.00 | 1.43 | 0.00 | 0.79 | -16.97 | 94.05 | -11.19 | 155.53 | 0.4500 | -794.0 | -642.5 | |
| 14.52 | -80.00 | 7.94 | -80.00 | -15.16 | 93.87 | -11.37 | 153.33 | 0.4257 | 882.0 | 999999 | |
| 33.58 | -80.00 | 18.21 | -80.00 | -13.96 | 93.90 | -11.34 | 152.04 | 0.4086 | -1298.7 | 999999 | |
| 0.00 | 4.81 | 0.00 | 2.67 | -17.05 | 93.60 | -11.64 | 154.74 | 0.4540 | -884.0 | -736.5 | |
| 1.51 | -80.00 | 0.82 | -80.00 | -13.84 | 93.66 | -11.59 | 151.37 | 0.4087 | -1135.2 | 999999 | |
| 0.00 | 1.16 | 0.00 | 0.61 | -10.06 | 93.82 | -11.42 | 146.55 | 0.3551 | -770.0 | -605.5 | |
| 1.25 | -80.00 | 0.68 | -80.00 | -14.75 | 93.54 | -11.70 | 152.21 | 0.4223 | -775.1 | 999999 | |
| 0.00 | 2.05 | 0.00 | 1.10 | -12.81 | 93.61 | -11.63 | 150.00 | 0.3947 | -1076.0 | -903.0 | |
| 0.45 | 11.76 | 0.24 | 6.30 | -12.04 | 93.62 | -11.62 | 148.98 | 0.3840 | -1075.6 | -678.1 | |
| 0.00 | 1.07 | 0.00 | 0.60 | -17.35 | 93.32 | -11.92 | 154.51 | 0.4601 | -718.0 | -662.9 | |
| 0.00 | 0.98 | 0.00 | 0.55 | -17.65 | 93.26 | -11.98 | 154.71 | 0.4647 | -945.0 | -784.4 | |
| 0.80 | 1.96 | 0.45 | 1.10 | -17.96 | 93.08 | -12.16 | 154.66 | 0.4701 | -905.9 | -754.6 | |
| 0.00 | 1.51 | 0.00 | 0.85 | -17.72 | 93.07 | -12.18 | 154.41 | 0.4670 | -1151.0 | -1012.5 | |
| 3.83 | 6.24 | 2.05 | 3.34 | -11.79 | 93.38 | -11.86 | 148.11 | 0.3826 | -1174.0 | -908.4 | |
| 0.00 | 0.98 | 0.00 | 0.55 | -18.23 | 93.00 | -12.24 | 154.76 | 0.4744 | -718.0 | -538.6 | |
| 0.00 | 1.25 | 0.00 | 0.67 | -13.17 | 93.28 | -11.96 | 149.76 | 0.4024 | -784.0 | -603.9 | |
| 0.00 | 1.34 | 0.00 | 0.71 | -10.45 | 93.40 | -11.84 | 146.20 | 0.3642 | -927.0 | -800.1 | |
| 38.21 | -80.00 | 20.80 | -80.00 | -14.11 | 93.20 | -12.04 | 150.76 | 0.4160 | -1165.8 | 999999 | |
| 0.00 | 1.43 | 0.00 | 0.77 | -12.14 | 93.26 | -11.98 | 148.37 | 0.3884 | -967.0 | -709.4 | |
| 0.00 | 0.98 | 0.00 | 0.55 | -17.66 | 92.91 | -12.33 | 154.06 | 0.4672 | -746.0 | -622.8 | |
| 0.00 | 1.51 | 0.00 | 0.82 | -13.01 | 93.06 | -12.18 | 149.11 | 0.4020 | -123.0 | -196.9 | |
| 2.49 | -80.00 | 1.36 | -80.00 | -14.44 | 92.92 | -12.32 | 150.60 | 0.4227 | -883.3 | 999999 | |
| 0.00 | 1.43 | 0.00 | 0.76 | -10.30 | 93.13 | -12.12 | 145.35 | 0.3647 | -842.0 | -641.3 | |
| 0.53 | 6.24 | 0.30 | 3.51 | -18.00 | 92.62 | -12.62 | 153.88 | 0.4738 | -986.2 | -707.8 | |
| 0.53 | 7.93 | 0.29 | 4.28 | -12.79 | 92.85 | -12.39 | 148.38 | 0.4008 | -802.0 | -801.1 | |
| 0.00 | 1.25 | 0.00 | 0.72 | -20.30 | 92.27 | -12.97 | 155.39 | 0.5074 | -631.0 | -571.1 | |
| 0.98 | 4.28 | 0.55 | 2.41 | -18.15 | 92.29 | -12.95 | 153.42 | 0.4780 | -748.6 | -617.0 | |
| 0.00 | 0.62 | 0.00 | 0.34 | -15.83 | 92.42 | -12.82 | 151.23 | 0.4454 | -591.0 | -635.4 | |
| 0.00 | 0.80 | 0.00 | 0.45 | -17.03 | 91.95 | -13.29 | 151.67 | 0.4652 | -710.0 | -604.4 | |
| 0.00 | 0.80 | 0.00 | 0.43 | -11.00 | 92.06 | -13.18 | 144.14 | 0.3839 | -805.0 | -541.4 | |
| 0.00 | 1.16 | 0.00 | 0.67 | -20.26 | 91.35 | -13.89 | 153.84 | 0.5128 | -655.0 | -560.9 | |
| 0.71 | 4.28 | 0.40 | 2.38 | -16.12 | 91.46 | -13.78 | 149.80 | 0.4567 | -822.0 | -735.2 | |
| 0.00 | 1.78 | 0.00 | 0.97 | -13.29 | 91.39 | -13.85 | 146.14 | 0.4198 | -1029.0 | -809.0 | |
| 0.00 | 1.43 | 0.00 | 0.79 | -15.08 | 91.21 | -14.03 | 148.11 | 0.4449 | -848.0 | -637.5 | |
| 0.00 | 1.60 | 0.00 | 0.87 | -12.07 | 91.37 | -13.87 | 144.37 | 0.4042 | -885.0 | -690.9 | |
| 0.00 | 1.60 | 0.00 | 0.87 | -13.13 | 91.21 | -14.03 | 145.58 | 0.4194 | -892.0 | -738.7 | |
| 0.53 | 3.74 | 0.29 | 2.03 | -12.04 | 91.21 | -14.03 | 144.02 | 0.4053 | -929.5 | -601.2 | |
| 0.00 | 1.96 | 0.00 | 1.07 | -13.65 | 91.08 | -14.16 | 146.05 | 0.4273 | -729.0 | -626.8 | |
| 0.00 | 1.16 | 0.00 | 0.64 | -13.69 | 89.83 | -15.41 | 143.81 | 0.4392 | -715.0 | -570.2 | |
| 0.00 | 0.80 | 0.00 | 0.43 | -8.32 | 90.00 | -15.25 | 135.41 | 0.3722 | -835.0 | -723.0 | |
| 0.00 | 1.25 | 0.00 | 0.70 | -15.98 | 88.64 | -16.60 | 144.80 | 0.4784 | -729.0 | -612.2 | |
| 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. | |