PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-06:57:50
G07     346.7          62.1                4.1 +/-    0.96       4.6 +/-    0.96  0.090 / 0.150
G08     84.8           51.8                6.9 +/-    0.67       8.5 +/-    0.67  0.070 / 0.130
G09     182.8          65.6                7.3 +/-    1.02       7.9 +/-    1.02  0.040 / 0.050
G11     140.2          17.1                7.9 +/-    0.95      18.6 +/-    0.95  0.030 / 0.050
G23     158.0          36.4                7.7 +/-    2.93      11.8 +/-    2.93  0.040 / 0.040
G27     48.6           26.9                3.3 +/-    1.94       6.1 +/-    1.94  0.030 / 0.040
G28     243.5          35.4                5.4 +/-    1.00       8.6 +/-    1.00  0.070 / 0.100
G30     307.1          39.2                2.5 +/-    0.69       3.7 +/-    0.69  0.050 / 0.100