PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-16:42:40
G02     24.5           61.3                7.6 +/-    0.73       8.5 +/-    0.73  0.030 / 0.030
G05     149.5          58.0                9.7 +/-    0.48      11.2 +/-    0.48  0.030 / 0.030
G06     52.3           17.3                7.4 +/-    2.17      17.4 +/-    2.17  0.030 / 0.030
G12     195.4          69.3                8.8 +/-    0.35       9.3 +/-    0.35  0.030 / 0.040
G19     95.7           15.6                8.4 +/-    1.00      20.6 +/-    1.00  0.050 / 0.050
G25     299.5          53.2                8.1 +/-    1.13       9.8 +/-    1.13  0.040 / 0.060
G29     304.6          24.8                7.0 +/-    1.20      13.8 +/-    1.20  0.210 / 0.100