PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-02:12:40
G02     65.8           27.3                7.5 +/-    2.01      13.9 +/-    2.01  0.080 / 0.120
G05     50.0           53.2                9.6 +/-    0.56      11.7 +/-    0.56  0.090 / 0.160
G12     182.9          24.6               13.2 +/-    0.96      26.1 +/-    0.96  0.180 / 0.380
G13     122.4          20.1               13.3 +/-    1.26      29.1 +/-    1.26  0.240 / 0.360
G15     160.0          17.9               14.5 +/-    2.11      33.6 +/-    2.11  0.040 / 0.050
G20     221.7          18.6               14.3 +/-    1.85      32.7 +/-    1.85  0.030 / 0.040
G21     277.0          21.3                9.9 +/-    2.15      21.0 +/-    2.15  0.090 / 0.290
G25     228.2          46.5               11.6 +/-    2.85      15.3 +/-    2.85  0.080 / 0.260
G29     332.4          60.9               11.0 +/-    0.41      12.4 +/-    0.41  0.070 / 0.100