PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-12:12:30
G07     340.1          60.5                4.6 +/-    0.77       5.2 +/-    0.77  0.080 / 0.090
G08     89.8           52.3                4.6 +/-    0.51       5.6 +/-    0.51  0.070 / 0.070
G09     182.6          67.1                5.0 +/-    0.69       5.4 +/-    0.69  0.050 / 0.090
G11     142.2          16.4                4.3 +/-    1.41      10.3 +/-    1.41  0.060 / 0.080
G23     156.7          35.8                4.2 +/-    0.97       6.6 +/-    0.97  0.030 / 0.040
G27     51.0           29.2                3.7 +/-    1.03       6.6 +/-    1.03  0.040 / 0.040
G28     241.1          33.1                7.8 +/-    2.71      12.8 +/-    2.71  0.100 / 0.230
G30     305.2          37.4                4.7 +/-    0.82       7.2 +/-    0.82  0.110 / 0.210