PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-15:28:00
G02     308.4          79.7                6.1 +/-    0.48       6.2 +/-    0.48  0.250 / 0.310
G05     167.9          29.5                9.1 +/-    2.36      16.1 +/-    2.36  0.190 / 0.130
G06     41.2           41.2                5.0 +/-    1.28       7.2 +/-    1.28  0.030 / 0.020
G12     313.5          72.4                6.9 +/-    0.47       7.2 +/-    0.47  0.030 / 0.020
G17     85.0           11.3                7.2 +/-    1.93      19.4 +/-    1.93  0.070 / 0.120
G19     70.2           32.4                5.4 +/-    3.95       9.0 +/-    3.95  0.080 / 0.110
G24     227.5          23.5                9.3 +/-    2.74      18.7 +/-    2.74  0.100 / 0.130
G25     317.2          29.0                6.4 +/-    1.55      11.4 +/-    1.55  0.120 / 0.130