PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-20:12:30
G02     56.8           35.8                7.2 +/-    0.89      11.2 +/-    0.89  0.040 / 0.050
G05     61.3           63.0                8.2 +/-    0.50       9.1 +/-    0.50  0.030 / 0.050
G12     181.9          31.2                9.9 +/-    2.98      17.0 +/-    2.98  0.130 / 0.360
G13     129.2          14.0               12.3 +/-    1.59      31.3 +/-    1.59  0.140 / 0.390
G21     269.5          15.2                9.7 +/-    1.81      24.1 +/-    1.81  0.060 / 0.120
G25     238.0          53.1                7.7 +/-    1.29       9.4 +/-    1.29  0.040 / 0.120
G29     326.2          51.5                6.2 +/-    0.81       7.7 +/-    0.81  0.040 / 0.070