PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-18:57:50
G02     232.6          71.1               11.1 +/-    0.78      11.7 +/-    0.78  0.060 / 0.280
G05     173.1          13.3               13.4 +/-    3.27      34.8 +/-    3.27  0.060 / 0.270
G06     42.0           60.0               10.1 +/-    0.32      11.5 +/-    0.32  0.040 / 0.070
G12     322.4          52.0               10.1 +/-    1.89      12.4 +/-    1.89  0.050 / 0.060
G17     68.2           24.4               10.2 +/-    0.66      20.1 +/-    0.66  0.060 / 0.120
G19     51.1           43.2                9.4 +/-    0.84      13.1 +/-    0.84  0.050 / 0.100
G24     247.4          36.6               13.5 +/-    1.51      20.8 +/-    1.51  0.030 / 0.050