PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-16:58:00
G07     27.6           69.3               11.4 +/-    0.47      12.1 +/-    0.47  0.040 / 0.050
G08     59.2           47.1               10.5 +/-    0.60      13.8 +/-    0.60  0.040 / 0.050
G09     179.1          44.4               14.3 +/-    0.93      19.5 +/-    0.93  0.030 / 0.030
G11     126.9          30.3               14.3 +/-    1.84      24.9 +/-    1.84  0.030 / 0.030
G18     111.1          12.6               12.3 +/-    1.92      32.3 +/-    1.92  0.040 / 0.040
G23     159.0          11.4               13.4 +/-    1.74      36.3 +/-    1.74  0.040 / 0.040
G27     38.7           13.2                8.2 +/-    1.92      21.3 +/-    1.92  0.150 / 0.280
G28     265.2          48.6               12.5 +/-    4.39      16.0 +/-    4.39  0.140 / 0.260
G30     325.5          54.8               10.1 +/-    0.45      12.1 +/-    0.45  0.170 / 0.260