PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-19:57:50
G02     299.2          81.0                5.7 +/-    4.92       5.7 +/-    4.92  0.110 / 0.190
G05     166.9          26.8               14.4 +/-   33.70      27.1 +/-   33.70  0.130 / 0.160
G06     39.7           47.3               11.9 +/-   33.60      15.6 +/-   33.60  0.100 / 0.240
G12     318.8          61.6               12.8 +/-   34.14      14.4 +/-   34.14  0.070 / 0.240
G17     79.0           17.1                7.4 +/-    8.92      17.5 +/-    8.92  0.040 / 0.030
G19     68.5           30.4                6.8 +/-    6.57      11.9 +/-    6.57  0.030 / 0.030
G24     234.4          27.5               10.9 +/-   13.70      20.1 +/-   13.70  0.040 / 0.040
G25     317.5          21.6                4.4 +/-   13.16       9.4 +/-   13.16  0.050 / 0.060