PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-18:58:00
G01     93.3           31.1               11.7 +/-    0.76      20.0 +/-    0.76  0.290 / 0.250
G07     122.9          48.3               13.2 +/-    0.69      17.0 +/-    0.69  0.160 / 0.280
G08     42.3           11.8                9.1 +/-    2.43      24.4 +/-    2.43  0.020 / 0.030
G11     72.9           41.3               11.7 +/-    0.77      16.6 +/-    0.77  0.030 / 0.030
G13     297.7          35.0               11.2 +/-    2.89      17.8 +/-    2.89  0.040 / 0.050
G17     213.3          47.7               12.9 +/-    0.73      16.7 +/-    0.73  0.030 / 0.040
G18     66.9           24.5               11.5 +/-    0.93      22.8 +/-    0.93  0.040 / 0.040
G19     213.6          23.3               13.5 +/-    1.87      27.4 +/-    1.87  0.030 / 0.050
G28     344.3          61.9               10.7 +/-    0.56      11.9 +/-    0.56  0.090 / 0.140
G30     96.0           77.0               12.3 +/-    0.30      12.5 +/-    0.30  0.070 / 0.130