PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-14:58:10
G01     99.8           28.6               10.6 +/-    1.33      19.2 +/-    1.33  0.040 / 0.020
G07     117.1          49.3               10.4 +/-    0.43      13.3 +/-    0.43  0.040 / 0.030
G08     41.7           13.0                6.3 +/-    2.75      16.5 +/-    2.75  0.050 / 0.040
G11     77.2           39.8                9.0 +/-    0.96      13.2 +/-    0.96  0.040 / 0.040
G13     305.5          30.9                8.3 +/-    2.02      14.3 +/-    2.02  0.080 / 0.150
G17     208.3          47.2                9.4 +/-    0.94      12.2 +/-    0.94  0.090 / 0.140
G19     210.8          20.7               12.7 +/-    1.88      27.5 +/-    1.88  0.060 / 0.090
G28     331.4          61.5                7.4 +/-    0.73       8.3 +/-    0.73  0.070 / 0.130
G30     44.3           80.0                8.7 +/-    0.69       8.8 +/-    0.69  0.040 / 0.050