PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-20:27:50
G02     86.0           12.1               12.0 +/-    2.64      31.9 +/-    2.64  0.170 / 0.240
G05     44.8           34.1               11.9 +/-    0.95      19.3 +/-    0.95  0.150 / 0.230
G13     97.1           35.0               13.6 +/-    1.07      21.6 +/-    1.07  0.120 / 0.190
G15     142.4          40.5               14.7 +/-    0.90      21.2 +/-    0.90  0.130 / 0.160
G18     233.5          30.0               13.8 +/-    2.06      24.1 +/-    2.06  0.040 / 0.040
G20     6.2            80.6               12.6 +/-    0.72      12.8 +/-    0.72  0.040 / 0.030
G21     300.1          38.7               12.2 +/-    1.73      18.2 +/-    1.73  0.050 / 0.080
G25     204.3          21.1               13.7 +/-    2.96      29.3 +/-    2.96  0.080 / 0.080
G26     305.4          17.5               11.9 +/-    0.96      27.9 +/-    0.96  0.140 / 0.090
G29     118.2          84.0               12.4 +/-    0.33      12.5 +/-    0.33  0.080 / 0.080