PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-13:27:50
G01     59.2           30.2                5.0 +/-    2.35       8.7 +/-    2.35  0.030 / 0.040
G07     142.6          21.3                7.1 +/-    1.64      15.2 +/-    1.64  0.030 / 0.040
G11     47.3           21.8                5.0 +/-    2.03      10.6 +/-    2.03  0.050 / 0.170
G13     261.0          35.0                6.7 +/-    2.22      10.6 +/-    2.22  0.060 / 0.140
G15     296.5          14.9                1.5 +/-    2.01       3.8 +/-    2.01  0.050 / 0.080
G17     267.9          78.4                5.5 +/-    0.43       5.6 +/-    0.43  0.130 / 0.080
G18     41.4           11.8                5.6 +/-    1.37      14.9 +/-    1.37  0.060 / 0.130
G19     232.7          47.8                5.3 +/-    1.89       6.8 +/-    1.89  0.060 / 0.110
G28     36.8           56.5                4.1 +/-    1.01       4.8 +/-    1.01  0.160 / 0.330
G30     144.7          53.2                7.1 +/-    0.68       8.6 +/-    0.68  0.150 / 0.300