PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-21:12:40
G02     60.3           32.3                5.7 +/-    1.83       9.5 +/-    1.83  0.250 / 0.330
G05     55.4           59.4                8.0 +/-    1.04       9.1 +/-    1.04  0.270 / 0.270
G12     184.8          32.1                7.7 +/-    1.12      12.8 +/-    1.12  0.070 / 0.060
G13     125.4          16.1               10.0 +/-    2.76      24.2 +/-    2.76  0.050 / 0.070
G15     162.4          14.1                9.7 +/-    3.81      24.7 +/-    3.81  0.070 / 0.100
G21     272.8          17.7               10.4 +/-    2.06      24.3 +/-    2.06  0.050 / 0.100
G25     235.3          51.0                8.0 +/-    3.19      10.0 +/-    3.19  0.130 / 0.430
G29     330.7          56.9                8.8 +/-    0.43      10.3 +/-    0.43  0.130 / 0.370