PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-07:27:30
G07     343.1          61.4                4.2 +/-    0.57       4.7 +/-    0.57  0.040 / 0.040
G08     86.0           51.7                5.3 +/-    1.24       6.6 +/-    1.24  0.040 / 0.040
G09     175.8          62.5                6.9 +/-    0.28       7.7 +/-    0.28  0.090 / 0.090
G11     140.9          17.3                5.6 +/-    2.01      13.1 +/-    2.01  0.070 / 0.080
G23     157.8          37.2                6.4 +/-    0.96       9.7 +/-    0.96  0.110 / 0.090
G27     51.1           29.6                4.4 +/-    1.13       7.8 +/-    1.13  0.080 / 0.120
G28     241.4          32.9                4.9 +/-    1.37       8.1 +/-    1.37  0.060 / 0.060
G30     305.3          37.4                4.4 +/-    1.29       6.7 +/-    1.29  0.070 / 0.100