PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-21:57:30
G02     58.3           34.2                8.4 +/-    0.43      13.5 +/-    0.43  0.030 / 0.040
G05     58.9           61.5                9.6 +/-    0.56      10.8 +/-    0.56  0.020 / 0.040
G12     182.5          30.8               12.4 +/-    1.15      21.3 +/-    1.15  0.040 / 0.110
G13     128.4          14.8               13.4 +/-    3.28      33.4 +/-    3.28  0.070 / 0.110
G15     165.9          10.7               -1.4 +/-   33.16      -3.7 +/-   33.16  0.200 / 0.490
G21     270.5          16.1               12.9 +/-    3.17      31.1 +/-    3.17  0.140 / 0.540
G25     237.0          52.3               10.7 +/-    1.23      13.2 +/-    1.23  0.050 / 0.090
G29     327.0          52.8                8.9 +/-    1.00      10.8 +/-    1.00  0.050 / 0.120