PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-01:12:50
G02     199.5          21.5                9.8 +/-    1.30      20.7 +/-    1.30  0.030 / 0.040
G06     172.3          52.2                9.5 +/-    0.44      11.7 +/-    0.44  0.040 / 0.030
G13     228.4          13.7                8.9 +/-    1.98      22.8 +/-    1.98  0.040 / 0.040
G17     15.7           62.9                6.6 +/-    0.82       7.3 +/-    0.82  0.040 / 0.040
G19     319.1          71.1                6.3 +/-    0.46       6.6 +/-    0.46  0.060 / 0.070
G24     311.0          28.5                5.7 +/-    0.94      10.3 +/-    0.94  0.050 / 0.080
G28     87.4           39.8                7.5 +/-    1.10      10.9 +/-    1.10  0.080 / 0.110
G30     156.1          13.0                8.5 +/-    1.68      22.1 +/-    1.68  0.070 / 0.100