PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-00:12:30
G02     207.2          48.1               11.7 +/-    0.49      15.1 +/-    0.49  0.040 / 0.050
G06     122.4          78.9               10.9 +/-    0.59      11.1 +/-    0.59  0.030 / 0.060
G12     313.4          24.4                8.1 +/-    0.98      16.1 +/-    0.98  0.120 / 0.090
G17     42.7           44.9                8.0 +/-    0.85      10.7 +/-    0.85  0.110 / 0.110
G19     20.9           58.3                8.9 +/-    0.87      10.2 +/-    0.87  0.040 / 0.020
G24     283.7          41.9                1.7 +/-    0.82       2.4 +/-    0.82  0.030 / 0.030
G28     113.2          22.8               12.3 +/-    1.77      25.3 +/-    1.77  0.050 / 0.070