PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-16:27:50
G02     20.9           63.6                7.0 +/-    1.12       7.7 +/-    1.12  0.040 / 0.060
G05     153.1          55.0                8.9 +/-    0.70      10.7 +/-    0.70  0.030 / 0.050
G06     50.7           19.7                6.1 +/-    1.33      13.5 +/-    1.33  0.030 / 0.030
G12     200.2          72.7                6.9 +/-    1.03       7.2 +/-    1.03  0.030 / 0.040
G19     93.1           17.4                8.6 +/-    0.93      20.2 +/-    0.93  0.040 / 0.060
G25     303.2          51.0                7.2 +/-    0.89       9.0 +/-    0.89  0.050 / 0.070
G29     302.5          22.7                6.5 +/-    1.43      13.5 +/-    1.43  0.090 / 0.160