PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-11:58:00
G02     284.1          81.9                4.3 +/-    0.92       4.4 +/-    0.92  0.050 / 0.140
G05     169.8          22.5                6.2 +/-    0.94      12.8 +/-    0.94  0.040 / 0.120
G06     39.0           54.3                2.9 +/-    0.42       3.5 +/-    0.42  0.160 / 0.400
G12     320.1          58.9                3.4 +/-    1.10       3.9 +/-    1.10  0.150 / 0.280
G17     78.7           16.1                4.0 +/-    2.33       9.8 +/-    2.33  0.090 / 0.130
G19     66.5           32.3                4.2 +/-    0.60       6.9 +/-    0.60  0.080 / 0.120
G24     238.8          30.2                5.2 +/-    2.79       9.1 +/-    2.79  0.030 / 0.030
G25     317.8          20.3                3.6 +/-    3.41       7.8 +/-    3.41  0.030 / 0.040