PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-21:58:00
G01     97.6           29.8               11.9 +/-    0.88      20.9 +/-    0.88  0.060 / 0.150
G07     118.7          51.5               13.8 +/-    0.44      17.1 +/-    0.44  0.060 / 0.130
G08     42.1           16.8                7.9 +/-    1.23      18.8 +/-    1.23  0.040 / 0.050
G11     79.4           42.9               13.1 +/-    0.42      18.2 +/-    0.42  0.040 / 0.070
G13     302.0          33.1               11.8 +/-    1.59      19.4 +/-    1.59  0.030 / 0.070
G17     211.2          43.2               16.3 +/-    0.96      22.5 +/-    0.96  0.040 / 0.080
G18     71.2           24.8               11.5 +/-    0.91      22.6 +/-    0.91  0.130 / 0.170
G19     212.0          20.8               17.2 +/-    1.04      37.1 +/-    1.04  0.100 / 0.210
G28     337.2          61.9               11.3 +/-    0.69      12.6 +/-    0.69  0.040 / 0.090
G30     84.4           77.5               12.7 +/-    1.07      12.9 +/-    1.07  0.040 / 0.080