PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-16:12:50
G01     56.6           29.2                9.6 +/-    1.04      17.1 +/-    1.04  0.040 / 0.050
G07     143.7          19.2               11.7 +/-    1.38      26.2 +/-    1.38  0.040 / 0.050
G11     46.7           20.6                9.3 +/-    1.75      20.1 +/-    1.75  0.060 / 0.090
G13     258.3          34.0               12.1 +/-    1.26      19.5 +/-    1.26  0.060 / 0.100
G15     292.8          15.5               10.3 +/-    2.08      25.2 +/-    2.08  0.040 / 0.060
G17     273.5          77.9               11.5 +/-    0.59      11.7 +/-    0.59  0.040 / 0.060
G18     40.2           10.5                9.0 +/-    1.86      25.0 +/-    1.86  0.070 / 0.240
G19     235.7          50.9               13.0 +/-    1.05      16.2 +/-    1.05  0.060 / 0.290
G28     41.2           55.6               11.9 +/-    0.61      14.1 +/-    0.61  0.080 / 0.270
G30     146.1          49.5               12.3 +/-    0.81      15.6 +/-    0.81  0.100 / 0.250