PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-15:27:50
G01     56.6           29.2                9.0 +/-    1.05      16.1 +/-    1.05  0.030 / 0.040
G07     143.7          19.1                9.6 +/-    1.38      21.5 +/-    1.38  0.050 / 0.060
G11     46.6           20.4                7.9 +/-    1.32      17.2 +/-    1.32  0.060 / 0.100
G13     258.2          34.0               10.0 +/-    1.34      16.1 +/-    1.34  0.060 / 0.110
G15     293.2          15.4                8.5 +/-    2.02      21.0 +/-    2.02  0.090 / 0.290
G17     275.5          78.3               12.3 +/-    0.60      12.5 +/-    0.60  0.100 / 0.310
G18     40.1           10.4                8.6 +/-    1.89      23.8 +/-    1.89  0.040 / 0.050
G19     235.6          50.6               12.3 +/-    1.44      15.4 +/-    1.44  0.040 / 0.060
G28     41.1           55.6               10.9 +/-    0.59      13.0 +/-    0.59  0.060 / 0.260
G30     146.2          49.8               11.9 +/-    0.83      15.0 +/-    0.83  0.060 / 0.240