PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-12:58:10
G01     86.0           32.6                4.5 +/-    1.73       7.5 +/-    1.73  0.030 / 0.030
G07     128.6          42.3                7.6 +/-    0.94      10.6 +/-    0.94  0.020 / 0.020
G11     63.6           37.4                6.3 +/-    0.74       9.6 +/-    0.74  0.040 / 0.060
G13     290.1          37.2                7.9 +/-    2.66      12.1 +/-    2.66  0.040 / 0.060
G17     217.0          58.5                7.6 +/-    1.04       8.7 +/-    1.04  0.050 / 0.100
G18     59.7           22.7                4.9 +/-    2.11      10.1 +/-    2.11  0.060 / 0.100
G19     216.5          26.9                5.8 +/-    1.81      10.8 +/-    1.81  0.080 / 0.100
G28     355.5          61.5                5.9 +/-    0.85       6.6 +/-    0.85  0.070 / 0.090
G30     112.6          75.1                7.2 +/-    0.47       7.4 +/-    0.47  0.060 / 0.130