PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-01:57:40
G08     311.3          18.2                7.6 +/-    2.32      17.4 +/-    2.32  0.060 / 0.080
G10     327.2          59.2                7.2 +/-    0.91       8.2 +/-    0.91  0.050 / 0.080
G14     216.9          26.6               11.6 +/-    0.68      21.9 +/-    0.68  0.080 / 0.190
G15     46.4           15.2                5.8 +/-    0.98      14.4 +/-    0.98  0.100 / 0.190
G20     337.3          62.8                8.6 +/-    0.56       9.5 +/-    0.56  0.060 / 0.090
G21     131.4          60.6                8.9 +/-    1.43      10.0 +/-    1.43  0.070 / 0.090
G24     75.5           29.5                7.4 +/-    0.74      13.1 +/-    0.74  0.030 / 0.030
G27     278.5          37.6               10.0 +/-    0.91      15.1 +/-    0.91  0.030 / 0.030
G32     220.9          51.7               12.7 +/-    1.59      15.6 +/-    1.59  0.040 / 0.060