PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-13:28:10
G01     222.0          12.7                3.5 +/-   13.05       9.3 +/-   13.05  0.110 / 0.190
G03     263.0          70.9                5.6 +/-    2.37       5.8 +/-    2.37  0.110 / 0.180
G09     297.7          11.3               -6.0 +/-   28.99     -16.2 +/-   28.99  0.110 / 0.310
G14     90.4           24.0                6.0 +/-    1.88      12.1 +/-    1.88  0.110 / 0.430
G16     138.0          51.9                8.4 +/-    2.80      10.3 +/-    2.80  0.060 / 0.070
G22     194.9          62.0                7.4 +/-    3.35       8.3 +/-    3.35  0.050 / 0.080
G23     315.6          46.3                3.8 +/-    2.51       5.0 +/-    2.51  0.040 / 0.040
G26     82.3           53.4                5.4 +/-    2.63       6.5 +/-    2.63  0.030 / 0.050
G31     48.4           24.9                3.8 +/-    6.47       7.4 +/-    6.47  0.050 / 0.060