PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-17:57:30
G02     240.5          74.2                9.3 +/-    0.45       9.6 +/-    0.45  0.040 / 0.050
G05     171.8          15.8               10.0 +/-    1.52      24.3 +/-    1.52  0.040 / 0.050
G06     40.5           58.3               11.8 +/-    0.42      13.6 +/-    0.42  0.060 / 0.110
G12     321.0          50.2                8.2 +/-    0.46      10.3 +/-    0.46  0.070 / 0.140
G17     68.8           24.9                9.0 +/-    1.62      17.6 +/-    1.62  0.060 / 0.070
G19     57.4           37.4                7.7 +/-    1.01      11.7 +/-    1.01  0.060 / 0.090
G24     246.0          34.8               11.1 +/-    1.89      17.7 +/-    1.89  0.030 / 0.040