PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-08:57:40
G03     253.7          69.5                5.3 +/-    0.92       5.6 +/-    0.92  0.040 / 0.040
G09     301.5          16.7                4.1 +/-    2.95       9.9 +/-    2.95  0.040 / 0.040
G14     95.4           19.2                3.8 +/-    1.85       8.4 +/-    1.85  0.110 / 0.230
G16     129.2          56.3                6.6 +/-    0.52       7.7 +/-    0.52  0.090 / 0.230
G22     197.4          59.3                6.5 +/-    0.27       7.4 +/-    0.27  0.030 / 0.040
G23     316.8          46.8                5.4 +/-    0.84       7.1 +/-    0.84  0.040 / 0.040
G26     73.2           51.9                5.5 +/-    1.00       6.8 +/-    1.00  0.040 / 0.050
G31     50.8           20.8                3.8 +/-    3.24       8.2 +/-    3.24  0.040 / 0.060