PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-14:43:10
G02     255.1          76.4                7.7 +/-    0.45       7.9 +/-    0.45  0.080 / 0.120
G05     172.0          19.3                9.2 +/-    2.02      20.6 +/-    2.02  0.080 / 0.120
G06     40.0           51.5                7.6 +/-    0.66       9.5 +/-    0.66  0.180 / 0.270
G12     321.5          61.1                6.6 +/-    1.27       7.5 +/-    1.27  0.130 / 0.300
G17     76.5           17.4                7.8 +/-    0.86      18.3 +/-    0.86  0.090 / 0.120
G19     59.6           38.7                7.6 +/-    1.26      11.3 +/-    1.26  0.100 / 0.130
G24     236.3          30.8                8.0 +/-    1.20      13.9 +/-    1.20  0.030 / 0.040
G25     317.4          19.6                4.8 +/-    2.17      10.6 +/-    2.17  0.020 / 0.040