PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/07-17:27:50
G02     55.1           36.8                7.9 +/-    0.70      12.1 +/-    0.70  0.100 / 0.310
G05     65.7           65.5                8.3 +/-    0.32       9.1 +/-    0.32  0.100 / 0.310
G12     184.5          36.6                9.4 +/-    1.71      14.5 +/-    1.71  0.050 / 0.060
G13     129.5          12.5               10.8 +/-    2.23      28.5 +/-    2.23  0.040 / 0.060
G21     268.5          14.2                8.5 +/-    2.32      21.5 +/-    2.32  0.090 / 0.410
G25     244.0          54.4                8.2 +/-    0.48       9.8 +/-    0.48  0.100 / 0.520
G29     326.0          50.7                8.2 +/-    0.90      10.3 +/-    0.90  0.040 / 0.090