PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-20:43:10
G02     33.2           55.3                7.7 +/-    0.64       9.1 +/-    0.64  0.030 / 0.040
G05     135.5          63.7                9.2 +/-    0.45      10.1 +/-    0.45  0.030 / 0.040
G06     55.3           12.9                7.8 +/-    1.66      20.4 +/-    1.66  0.050 / 0.050
G12     190.5          63.3                8.7 +/-    0.77       9.6 +/-    0.77  0.060 / 0.050
G19     100.5          11.0                9.1 +/-    2.08      24.9 +/-    2.08  0.030 / 0.040
G25     293.7          54.9                7.2 +/-    2.82       8.6 +/-    2.82  0.040 / 0.040
G29     308.0          28.2                6.2 +/-    1.57      11.2 +/-    1.57  0.090 / 0.220