PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-09:13:00
G03     239.1          66.7                8.6 +/-    3.62       9.3 +/-    3.62  0.110 / 0.170
G07     250.0          11.4               -2.8 +/-   13.33      -7.6 +/-   13.33  0.090 / 0.160
G09     305.6          22.1                5.8 +/-    1.82      12.1 +/-    1.82  0.090 / 0.280
G14     102.4          11.2                2.1 +/-    3.26       5.6 +/-    3.26  0.090 / 0.240
G16     124.1          61.0                8.6 +/-    2.94       9.7 +/-    2.94  0.040 / 0.050
G22     191.8          52.6               12.0 +/-    8.87      14.6 +/-    8.87  0.050 / 0.060
G23     320.1          49.8                4.4 +/-    0.88       5.6 +/-    0.88  0.060 / 0.040
G26     67.0           51.6              -53.7 +/-   77.42     -66.4 +/-   77.42  0.050 / 0.050
G31     53.3           18.0                8.8 +/-   14.08      20.3 +/-   14.08  0.030 / 0.050