PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-15:57:40
G01     59.4           30.0                9.7 +/-    1.38      17.0 +/-    1.38  0.090 / 0.230
G06     179.8          15.8               14.4 +/-    1.92      35.1 +/-    1.92  0.120 / 0.210
G07     142.1          18.5               12.5 +/-    3.60      28.6 +/-    3.60  0.080 / 0.130
G11     47.2           20.5                8.1 +/-    2.67      17.7 +/-    2.67  0.080 / 0.160
G13     264.2          34.7               13.9 +/-    1.53      22.2 +/-    1.53  0.040 / 0.030
G15     296.8          15.3                7.8 +/-    1.20      19.2 +/-    1.20  0.040 / 0.030
G17     269.7          78.9               12.0 +/-    0.67      12.2 +/-    0.67  0.110 / 0.250
G19     233.8          53.4               12.8 +/-    2.17      15.5 +/-    2.17  0.130 / 0.190
G28     36.7           56.4               12.9 +/-    0.77      15.1 +/-    0.77  0.040 / 0.070
G30     143.7          54.3               11.6 +/-    0.67      14.0 +/-    0.67  0.050 / 0.100