PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-16:27:40
G02     15.7           66.6                6.3 +/-    0.87       6.8 +/-    0.87  0.030 / 0.060
G05     156.2          51.3               10.5 +/-    0.93      13.0 +/-    0.93  0.030 / 0.050
G06     49.0           22.5                6.3 +/-    0.71      13.0 +/-    0.71  0.040 / 0.070
G12     208.3          76.3                8.3 +/-    0.52       8.5 +/-    0.52  0.040 / 0.060
G19     89.9           19.7                8.8 +/-    0.66      19.4 +/-    0.66  0.020 / 0.030
G25     307.1          48.1                9.1 +/-    1.30      11.8 +/-    1.30  0.030 / 0.030
G29     299.8          20.2                7.9 +/-    1.27      17.3 +/-    1.27  0.070 / 0.120