PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-13:27:50
G01     221.1          11.7                5.7 +/-    5.90      15.4 +/-    5.90  0.130 / 0.200
G03     258.4          70.8                6.9 +/-    0.77       7.2 +/-    0.77  0.120 / 0.260
G09     298.6          12.3                6.1 +/-    2.13      16.2 +/-    2.13  0.040 / 0.050
G14     91.6           23.2                6.7 +/-    0.95      13.6 +/-    0.95  0.040 / 0.060
G16     136.2          53.1                8.8 +/-    0.92      10.8 +/-    0.92  0.060 / 0.080
G22     193.8          60.6                7.7 +/-    0.70       8.6 +/-    0.70  0.060 / 0.070
G23     316.7          47.3                4.4 +/-    0.92       5.7 +/-    0.92  0.050 / 0.050
G26     79.8           53.1                6.9 +/-    0.82       8.3 +/-    0.82  0.060 / 0.060
G31     49.1           23.8                4.7 +/-    1.04       9.5 +/-    1.04  0.030 / 0.050