PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-01:28:10
G02     200.7          28.7                9.1 +/-    1.71      16.4 +/-    1.71  0.030 / 0.030
G06     168.8          60.3                7.6 +/-    0.55       8.6 +/-    0.55  0.040 / 0.030
G17     24.8           57.4                6.3 +/-    0.93       7.3 +/-    0.93  0.040 / 0.030
G19     342.0          69.1                5.4 +/-    0.45       5.7 +/-    0.45  0.030 / 0.030
G24     305.7          33.5                5.2 +/-    1.90       8.5 +/-    1.90  0.050 / 0.090
G28     95.3           35.5                6.3 +/-    0.86       9.9 +/-    0.86  0.090 / 0.090