PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-04:58:00
G03     228.4          64.8                6.4 +/-    0.40       7.0 +/-    0.40  0.040 / 0.070
G07     251.7          11.3                2.9 +/-    7.71       7.9 +/-    7.71  0.040 / 0.070
G09     308.4          27.3                2.3 +/-    0.79       4.2 +/-    0.79  0.080 / 0.380
G14     103.9          11.4                3.5 +/-    1.53       9.5 +/-    1.53  0.100 / 0.390
G16     110.8          62.2                5.9 +/-    0.93       6.6 +/-    0.93  0.100 / 0.540
G22     193.0          50.0                7.9 +/-    1.16      10.0 +/-    1.16  0.100 / 0.560
G23     322.9          52.9                6.1 +/-    0.92       7.4 +/-    0.92  0.050 / 0.060
G26     60.6           47.7                4.1 +/-    0.47       5.3 +/-    0.47  0.050 / 0.060
G31     55.5           14.9                2.9 +/-    2.45       7.2 +/-    2.45  0.040 / 0.060