PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/14-14:27:50
G01     107.5          25.3               11.2 +/-    0.74      21.7 +/-    0.74  0.030 / 0.040
G07     106.1          58.7               12.6 +/-    0.72      14.5 +/-    0.72  0.030 / 0.030
G08     41.9           20.3                8.4 +/-    0.74      18.2 +/-    0.74  0.080 / 0.130
G09     174.0          12.8               11.4 +/-    0.94      29.9 +/-    0.94  0.080 / 0.130
G11     89.0           42.6               11.6 +/-    0.49      16.2 +/-    0.49  0.050 / 0.050
G13     309.9          28.5                9.3 +/-    1.51      16.7 +/-    1.51  0.040 / 0.060
G17     205.7          37.2               12.5 +/-    1.23      19.0 +/-    1.23  0.030 / 0.040
G18     80.6           24.1                9.7 +/-    0.82      19.4 +/-    0.82  0.030 / 0.050
G28     316.7          60.9               10.7 +/-    0.83      12.1 +/-    0.83  0.040 / 0.090
G30     17.7           77.6               12.3 +/-    1.02      12.5 +/-    1.02  0.040 / 0.080