PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-08:42:10
G08     117.9          45.1                7.5 +/-    0.39      10.1 +/-    0.39  0.030 / 0.040
G09     246.8          84.3                3.6 +/-    0.18       3.6 +/-    0.18  0.030 / 0.040
G16     42.6           21.9                2.4 +/-    1.95       5.1 +/-    1.95  0.100 / 0.130
G23     149.0          59.2                6.6 +/-    0.39       7.5 +/-    0.39  0.090 / 0.130
G27     70.1           36.1                4.8 +/-    0.87       7.4 +/-    0.87  0.040 / 0.050
G28     227.5          18.1                5.5 +/-    2.69      12.6 +/-    2.69  0.040 / 0.050
G30     289.7          24.5                5.0 +/-    1.02       9.9 +/-    1.02  0.190 / 0.260