PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-11:58:10
G02     301.8          82.1                4.1 +/-    0.85       4.2 +/-    0.85  0.100 / 0.110
G05     168.9          24.7                5.4 +/-    2.13      10.6 +/-    2.13  0.100 / 0.110
G06     39.1           52.1                3.3 +/-    0.76       4.1 +/-    0.76  0.070 / 0.160
G12     319.1          61.3                3.8 +/-    0.91       4.2 +/-    0.91  0.100 / 0.120
G17     80.6           14.7                4.7 +/-    3.17      11.9 +/-    3.17  0.200 / 0.220
G19     68.6           30.9                4.4 +/-    1.70       7.6 +/-    1.70  0.140 / 0.160
G24     236.7          28.7                5.7 +/-    0.69      10.3 +/-    0.69  0.020 / 0.020
G25     317.8          22.4                3.8 +/-    2.27       7.9 +/-    2.27  0.030 / 0.030