PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-11:42:50
G02     31.4           57.4                2.4 +/-    0.71       2.8 +/-    0.71  0.040 / 0.040
G05     146.5          58.2                5.7 +/-    1.06       6.6 +/-    1.06  0.030 / 0.040
G06     50.2           23.8                1.1 +/-    0.94       2.2 +/-    0.94  0.080 / 0.300
G12     211.7          72.9                2.1 +/-    1.22       2.2 +/-    1.22  0.120 / 0.210
G19     97.4           11.3                4.3 +/-    1.86      11.8 +/-    1.86  0.030 / 0.030
G20     199.1          20.2                5.5 +/-    1.85      12.0 +/-    1.85  0.020 / 0.030
G25     302.3          50.9                1.3 +/-    0.96       1.6 +/-    0.96  0.060 / 0.100
G29     306.5          28.6                2.1 +/-    1.59       3.8 +/-    1.59  0.050 / 0.110