PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/07-08:27:50
G01     112.7          22.2                6.3 +/-    0.96      13.2 +/-    0.96  0.030 / 0.030
G07     97.8           61.5                5.5 +/-    0.37       6.2 +/-    0.37  0.030 / 0.020
G08     42.3           23.2                1.6 +/-    0.56       3.2 +/-    0.56  0.030 / 0.040
G09     172.3          14.3                5.6 +/-    2.95      14.1 +/-    2.95  0.030 / 0.040
G11     95.1           42.0                6.2 +/-    0.55       8.8 +/-    0.55  0.070 / 0.190
G13     313.5          25.1                3.4 +/-    1.00       6.6 +/-    1.00  0.070 / 0.210
G17     202.9          33.8                6.8 +/-    0.94      11.0 +/-    0.94  0.100 / 0.220
G18     84.8           22.8                3.2 +/-    1.17       6.6 +/-    1.17  0.100 / 0.210
G28     304.1          59.2                4.6 +/-    0.72       5.2 +/-    0.72  0.160 / 0.320
G30     356.7          73.4                4.9 +/-    0.77       5.1 +/-    0.77  0.180 / 0.390